1 00:00:00,000 --> 00:00:09,000 Stargazing scientists at NASA are confident that when the next few decades humans will discover the very first signs of extraterrestrial life. 2 00:00:09,000 --> 00:00:14,000 Yet some believe it's entirely possible alien craft have already visited Earth. 3 00:00:17,000 --> 00:00:19,000 Large black flying object. 4 00:00:19,000 --> 00:00:21,000 Hey calm down calm down. 5 00:00:21,000 --> 00:00:25,000 But extraordinary claims demand extraordinary evidence. 6 00:00:25,000 --> 00:00:33,000 In this series I'm going to investigate some of the most remarkable and recent UFO sightings from around the world. 7 00:00:33,000 --> 00:00:36,000 They saw something really strange in the sky that day. 8 00:00:37,000 --> 00:00:43,000 And I'll be joined by renowned astrophysicist and space journalist Sarah Cruders. 9 00:00:43,000 --> 00:00:48,000 The thing is with something so extraordinary like this we've got to look at all the more logical explanations. 10 00:00:48,000 --> 00:00:51,000 I still think this can be explained by science. 11 00:00:52,000 --> 00:00:56,000 As together we'll separate back from fiction once and for all. 12 00:00:56,000 --> 00:00:59,000 That is an unidentified flying object. 13 00:00:59,000 --> 00:01:01,000 I knew you were going to say that and yes it is. 14 00:01:01,000 --> 00:01:04,000 It's one of the greatest UFO mysteries of all time. 15 00:01:04,000 --> 00:01:09,000 From our specially created UFO investigation hub we'll speak to experts. 16 00:01:09,000 --> 00:01:14,000 We have no conventional explanation for what we are seeing here. 17 00:01:14,000 --> 00:01:15,000 Whistleblowers. 18 00:01:15,000 --> 00:01:21,000 Anytime you step out of ranks in an organization like mine there's obviously going to be some repercussions. 19 00:01:21,000 --> 00:01:23,000 And first hand witnesses. 20 00:01:23,000 --> 00:01:25,000 There was this massive boomerang. 21 00:01:25,000 --> 00:01:28,000 It was at least a mile to a mile and a half wide. 22 00:01:28,000 --> 00:01:29,000 It was huge. 23 00:01:29,000 --> 00:01:32,000 Wow that's just spooked me now. 24 00:01:32,000 --> 00:01:35,000 And finally answer the big question. 25 00:01:36,000 --> 00:01:38,000 Are we alone in the universe? 26 00:01:38,000 --> 00:01:41,000 Whatever they are they're not of this world. 27 00:01:45,000 --> 00:01:50,000 The World 28 00:01:54,000 --> 00:02:02,000 Four years ago the world was rocked by one of the most significant and compelling UFO sightings ever recorded. 29 00:02:05,000 --> 00:02:09,000 A bizarre object was observed tumbling into our solar system. 30 00:02:09,000 --> 00:02:14,000 Traveling at the blistering speed of 196,000 miles per hour. 31 00:02:17,000 --> 00:02:21,000 The object named a Muamua came from the direction of Vega. 32 00:02:21,000 --> 00:02:24,000 One of the brightest stars in the northern hemisphere. 33 00:02:24,000 --> 00:02:28,000 On what some are convinced was a deliberate trajectory to Earth. 34 00:02:29,000 --> 00:02:34,000 The World 35 00:02:35,000 --> 00:02:43,000 Leading scientists have been left questioning whether this was our first official contact with an alien race. 36 00:02:45,000 --> 00:02:48,000 We don't quite yet have the physics or mathematics to explain it. 37 00:02:48,000 --> 00:02:50,000 Why is it speeding up? 38 00:02:50,000 --> 00:02:52,000 It was definitely not a comet. 39 00:02:52,000 --> 00:02:57,000 Potentially this object from 2017 was artificially in origin. 40 00:02:57,000 --> 00:03:01,000 At that point we have to just hope that they are benevolent. 41 00:03:04,000 --> 00:03:08,000 In October 2017 something strange approached Earth. 42 00:03:08,000 --> 00:03:12,000 An object unlike anything humans had seen before. 43 00:03:12,000 --> 00:03:19,000 This interloper from deep space was first spotted on the Pan-Stars telescope in Hawaii. 44 00:03:20,000 --> 00:03:24,000 And subsequently confirmed by observatories around the world. 45 00:03:24,000 --> 00:03:28,000 To be our very first visitor from interstellar space. 46 00:03:28,000 --> 00:03:32,000 Its bizarre shape wasn't like anything seen before. 47 00:03:32,000 --> 00:03:35,000 Flat, smooth, long and thin. 48 00:03:35,000 --> 00:03:40,000 Around 800 meters in length and just 80 meters thick. 49 00:03:40,000 --> 00:03:44,000 It surfaced 10 times more reflective than a typical comet. 50 00:03:44,000 --> 00:03:50,000 A moua moua plunges into our solar system passing inside the orbits of Mercury. 51 00:03:50,000 --> 00:03:54,000 A mere 23 million kilometers from Earth. 52 00:03:54,000 --> 00:03:57,000 Far closer than any planet has ever come. 53 00:03:57,000 --> 00:04:03,000 By the time the world's scientists and astronomers had trained their scopes onto the mysterious visitor. 54 00:04:03,000 --> 00:04:05,000 It was leaving us again. 55 00:04:05,000 --> 00:04:10,000 But what the cigar-shaped object did next defied all known understanding. 56 00:04:10,000 --> 00:04:12,000 It accelerated. 57 00:04:12,000 --> 00:04:15,000 As if something were pushing it on. 58 00:04:15,000 --> 00:04:21,000 Astronomers and scientists have yet to find an explanation for the increase in velocity. 59 00:04:21,000 --> 00:04:24,000 As it left our solar system. 60 00:04:24,000 --> 00:04:30,000 Experts are unable to rule out the possibility it was an alien craft. 61 00:04:30,000 --> 00:04:36,000 Making this surely the number one UFO sighting of all the other stars. 62 00:04:36,000 --> 00:04:41,000 And in this investigation we're going to establish once and for all. 63 00:04:41,000 --> 00:04:46,000 Was a moua moua just a rock or an alien rocket? 64 00:04:56,000 --> 00:05:03,000 So, Sarah, people observed this strange cigar-shaped object entering our solar system. 65 00:05:03,000 --> 00:05:07,000 They called it a moua moua. People got really excited. 66 00:05:07,000 --> 00:05:11,000 They thought it was a sign of extraterrestrial life. 67 00:05:11,000 --> 00:05:12,000 Were they right? 68 00:05:12,000 --> 00:05:16,000 Is the extraterrestrial intelligence outside there in the universe? 69 00:05:16,000 --> 00:05:17,000 That is the big question. 70 00:05:17,000 --> 00:05:23,000 I mean, a moua moua, it was discovered by a telescope in Hawaii and it actually means the name messenger. 71 00:05:23,000 --> 00:05:24,000 First messenger. 72 00:05:24,000 --> 00:05:28,000 Some scientists have come up with the hypothesis that this could potentially be an alien spacecraft 73 00:05:28,000 --> 00:05:34,000 because if it's very long cigar shape it wasn't what we expected an object outside of our solar system to look like. 74 00:05:34,000 --> 00:05:37,000 We don't know whether there's more intelligent civilisations out there. 75 00:05:37,000 --> 00:05:43,000 Do people think it was a spaceship because it resembled Stanley Kubrick's spaceship in 2001, a space odyssey? 76 00:05:43,000 --> 00:05:46,000 Well, kind of, but it's because we expected it to be round. 77 00:05:46,000 --> 00:05:52,000 That goes with all the current laws of physics for how solar systems form, bodies in space form. 78 00:05:52,000 --> 00:05:57,000 So it was an unusual shape and also it was accelerating which we didn't know. 79 00:05:57,000 --> 00:05:59,000 So the show signs are being powered then? 80 00:05:59,000 --> 00:06:00,000 We don't know. 81 00:06:00,000 --> 00:06:05,000 We don't know, but it's certainly interesting and the question of are we alone is a huge scientific question. 82 00:06:05,000 --> 00:06:07,000 It's the age old question. 83 00:06:07,000 --> 00:06:08,000 How do we establish it? 84 00:06:08,000 --> 00:06:10,000 I've got someone we can speak to about this. 85 00:06:10,000 --> 00:06:12,000 His name is Seth Shostak. 86 00:06:12,000 --> 00:06:15,000 He's an astronomer at the SETI Institute. 87 00:06:15,000 --> 00:06:17,000 Hi Seth, Craig and Sarah here. 88 00:06:17,000 --> 00:06:18,000 Hi. 89 00:06:18,000 --> 00:06:24,000 Dr Seth Shostak is a highly respected senior astronomer at the SETI Institute, 90 00:06:24,000 --> 00:06:31,000 which stands for the Search for Extraterrestrial Intelligence and is an agency established by NASA, 91 00:06:31,000 --> 00:06:39,000 dedicated to investigating the nature of the universe and understanding the prevalence of life beyond Earth. 92 00:06:39,000 --> 00:06:42,000 So what is the significance of the moon? 93 00:06:42,000 --> 00:06:47,000 Because I mean people have postulated that it might be an alien craft. 94 00:06:47,000 --> 00:06:53,000 They have and some of the people that have done that are actually, you know, they're very qualified people. 95 00:06:53,000 --> 00:06:55,000 I mean Avi Loeb of Harvard. 96 00:06:55,000 --> 00:06:56,000 He's a very qualified guy. 97 00:06:56,000 --> 00:06:57,000 He's a very smart guy. 98 00:06:57,000 --> 00:06:59,000 And he's also a brave guy. 99 00:06:59,000 --> 00:07:05,000 He would step up and say, look, one explanation you're just ruling out right from the beginning is that it's a spacecraft. 100 00:07:05,000 --> 00:07:12,000 But it doesn't really have any behavior that's so consistent with what you'd expect from a spacecraft, 101 00:07:12,000 --> 00:07:15,000 vis-a-vis just an ordinary rock and asteroid. 102 00:07:15,000 --> 00:07:20,000 But on the other hand, would you see something that you don't quite understand in the universe? 103 00:07:20,000 --> 00:07:28,000 It's not a bad thing to at least consider that it might be alien activity because otherwise you throw out the baby with the bath water. 104 00:07:28,000 --> 00:07:31,000 Did the shape of it surprise you in any way? 105 00:07:31,000 --> 00:07:34,000 Well, I mean it does have this very elongated shape. 106 00:07:34,000 --> 00:07:43,000 Many, many people have seen this artist's rendition, which makes, you know, a moon will look like a kind of a bumpy cigar in space. 107 00:07:43,000 --> 00:07:45,000 But actually we don't know that it looks anything like that. 108 00:07:45,000 --> 00:07:47,000 All we know is it's longer than it is wide. 109 00:07:47,000 --> 00:07:48,000 That's what we know. 110 00:07:48,000 --> 00:07:55,000 Anything that has traveled, you know, so many light years over, who knows, maybe even millions of years, right? 111 00:07:55,000 --> 00:08:03,000 The stream of particles that it goes through would likely, you know, sort of turn it into a streamlined shape. 112 00:08:03,000 --> 00:08:07,000 Just could be a result of simply its travels through space. 113 00:08:07,000 --> 00:08:14,000 But there is a potential there, just a small chance that this is an alien spacecraft perhaps visiting somewhere else in our solar system. 114 00:08:14,000 --> 00:08:16,000 Yeah, it's possible. 115 00:08:16,000 --> 00:08:24,000 The best argument was made that this is something that was deliberately sent our way is the very fact that it got into our solar system. 116 00:08:24,000 --> 00:08:30,000 You know, it's like saying, ah, well, all right, I'm going to put a coin, say, 100 feet away on the sidewalk here, 117 00:08:30,000 --> 00:08:37,000 and I'm just going to throw a tennis ball up into the air and it's going to hit that coin, you know, by chance to come that close. 118 00:08:37,000 --> 00:08:39,000 It's just not so likely. 119 00:08:39,000 --> 00:08:44,000 Do you think that extraterrestrial life exists in our universe? 120 00:08:44,000 --> 00:08:46,000 There's a lot of real estate out there, right? 121 00:08:46,000 --> 00:08:53,000 There are like a trillion, trillion, with a D, planets and moons in our galaxy alone. 122 00:08:53,000 --> 00:08:56,000 So if we are alone, well, that's remarkable. 123 00:08:56,000 --> 00:09:02,000 You can sleep better at night because that means that we are, in fact, a miracle. 124 00:09:02,000 --> 00:09:08,000 How do we work out the probability of there being intelligent life on any of these planets? 125 00:09:08,000 --> 00:09:15,000 Well, you can use the Drake equation to kind of estimate how many intelligent civilizations are out there. 126 00:09:15,000 --> 00:09:18,000 I give you a million Earths, right? 127 00:09:18,000 --> 00:09:20,000 Well, what fraction of them will cook up life? 128 00:09:20,000 --> 00:09:23,000 How many of them will cook up life with a brain? 129 00:09:23,000 --> 00:09:28,000 And how many of those with a brain will get into a position where they could potentially come here in their saucers? 130 00:09:28,000 --> 00:09:34,000 So you haven't got a date where you think that they'll arrive because I just want to make sure because I want to be in? 131 00:09:34,000 --> 00:09:38,000 You want to be in? But I'll buy you all a cup of coffee, a flat white. 132 00:09:38,000 --> 00:09:47,000 If we don't find DT by 2035 or some date like that, by that time we will have looked at at least a million star systems 133 00:09:47,000 --> 00:09:50,000 compared to only a few thousand as of the moment. 134 00:09:50,000 --> 00:09:52,000 So chances of finding something go way up. 135 00:09:52,000 --> 00:09:53,000 Thank you so much, Seth. 136 00:09:53,000 --> 00:09:55,000 Well, it's been my pleasure. 137 00:09:55,000 --> 00:09:57,000 How do you feel about that? Science, come on. 138 00:09:57,000 --> 00:09:59,000 One thing he said kind of went over my head. 139 00:09:59,000 --> 00:10:00,000 Which? 140 00:10:00,000 --> 00:10:01,000 Well, several things really. 141 00:10:01,000 --> 00:10:03,000 But what is the Drake equation? 142 00:10:03,000 --> 00:10:06,000 Well, the Drake equation is basically an equation. You can see it there. 143 00:10:06,000 --> 00:10:11,000 It's just a way of finding out or estimating how many intelligent civilizations exist in the universe. 144 00:10:11,000 --> 00:10:13,000 We don't know, but this is a good estimate. 145 00:10:13,000 --> 00:10:18,000 So basically it looks at the rate of star formation, the number of stars which might have planets, 146 00:10:18,000 --> 00:10:21,000 and then the number of those stars with planets where life could exist, 147 00:10:21,000 --> 00:10:23,000 which might be in the so-called Goldilocks zone. 148 00:10:23,000 --> 00:10:26,000 So that's where it's not too hot, not too cold, just right for life to exist. 149 00:10:26,000 --> 00:10:27,000 Are you with me still? 150 00:10:27,000 --> 00:10:28,000 I'm still with you. 151 00:10:28,000 --> 00:10:33,000 So it's hugely complex, but actually if you even put in the lowest numbers, 152 00:10:33,000 --> 00:10:38,000 you still get an answer that we're not the only intelligent civilization in the universe. 153 00:10:40,000 --> 00:10:45,000 If you can handle the eye-watering numbers, so glad I paid attention at school, 154 00:10:45,000 --> 00:10:53,000 and work this equation designed to estimate the odds of finding intelligent extraterrestrial life to its conclusion, 155 00:10:54,000 --> 00:11:01,000 then the answer is there are probably between a thousand and a hundred million planets in our Milky Way alone 156 00:11:01,000 --> 00:11:04,000 that have developed complex civilizations. 157 00:11:11,000 --> 00:11:16,000 The big question is how many of those intelligent life forms can build spaceships? 158 00:11:16,000 --> 00:11:18,000 Well, that's actually a great question. 159 00:11:18,000 --> 00:11:23,000 Do alien civilizations only get so far, and then they kill each other, destroy themselves? 160 00:11:23,000 --> 00:11:24,000 We don't know. 161 00:11:24,000 --> 00:11:26,000 It's a sobering thought, though. 162 00:11:29,000 --> 00:11:33,000 But let's assume one alien civilization did survive, 163 00:11:33,000 --> 00:11:37,000 and a Muammua is evidence of their existence. 164 00:11:37,000 --> 00:11:41,000 We have to get to the truth about what this extraordinary object really is. 165 00:11:44,000 --> 00:11:45,000 Coming up. 166 00:11:45,000 --> 00:11:48,000 Do you think there's a potential that alien civilizations are watching us? 167 00:11:48,000 --> 00:11:50,000 Yes, completely. 168 00:11:50,000 --> 00:11:57,000 XMOD official Nick Pope believes Ayrth could have been a Muammua's intended destination. 169 00:11:57,000 --> 00:12:01,000 If they're out there, they've probably found us already. 170 00:12:01,000 --> 00:12:06,000 While Sarah's convinced alien life is already very close to home. 171 00:12:06,000 --> 00:12:12,000 Jupiter has got this moon called Europa, and there could potentially be some sort of alien fish like that. 172 00:12:12,000 --> 00:12:14,000 They're just getting really interested. 173 00:12:16,000 --> 00:12:24,000 In this investigation, we're looking at one of the greatest and seismically important UFO sightings in human history. 174 00:12:25,000 --> 00:12:31,000 It may force us to come to terms with a profound realization that we are not alone. 175 00:12:35,000 --> 00:12:42,000 On the 19th of October 2017, the very first known interstellar object was observed 176 00:12:42,000 --> 00:12:46,000 to have passed through our solar system at hyperbolic speed. 177 00:12:47,000 --> 00:12:56,000 Cigar shaped and elongated, 800 meters in length, and ten times longer than it was wide, tumbling end over end. 178 00:12:56,000 --> 00:12:59,000 The missile was named a Muammua. 179 00:12:59,000 --> 00:13:06,000 The object passed within 23 million kilometers of Earth, which in galactic terms is a flyby. 180 00:13:07,000 --> 00:13:11,000 As well as speculation on what it was and where it could have come from, 181 00:13:11,000 --> 00:13:21,000 the unexpected appearance of such a massive projectile was a reminder of how vulnerable we are to a potential interstellar impact or event. 182 00:13:23,000 --> 00:13:37,000 On the 30th of June 1908, the largest asteroid impacting recorded history flattened over 2,000 square kilometers of remote Siberian forest. 183 00:13:38,000 --> 00:13:45,000 The Tunguska event released a thousand times more energy than the atomic bomb dropped on Hiroshima. 184 00:13:46,000 --> 00:13:50,000 But whether a Muammua was a rock at all is up for debate. 185 00:13:51,000 --> 00:13:57,000 Its bizarre shape and trajectory has left scientists considering a world-rocking possibility. 186 00:14:00,000 --> 00:14:04,000 People have postulated that it might be an alien craft. 187 00:14:04,000 --> 00:14:10,000 It might indeed be something deliberate, something directed by alien intelligence if you like. 188 00:14:11,000 --> 00:14:19,000 What has really grabbed the expert's attention is that as a Muammua turned and headed back into deep space, it accelerated. 189 00:14:22,000 --> 00:14:29,000 One possibility is that it was a comet, which unlike an asteroid, is an icy dusty object, 190 00:14:29,000 --> 00:14:38,000 which would typically eject vapor in the form of a coma or tail as it passes closer to the sun, which would explain the increase in speed. 191 00:14:39,000 --> 00:14:41,000 But a Muammua had no tail. 192 00:14:44,000 --> 00:14:51,000 We know this object was extraterrestrial because it didn't come from our solar system, but was it under alien control? 193 00:14:52,000 --> 00:14:55,000 We don't know, but we're on a mission to find out. 194 00:15:00,000 --> 00:15:03,000 Sarah, we're talking about a Muammua. 195 00:15:04,000 --> 00:15:09,000 We are barely beginning to scratch the surface. With a Muammua, we know that it is dividing some scientists' opinion. 196 00:15:10,000 --> 00:15:11,000 So who thinks it's an alien craft? 197 00:15:12,000 --> 00:15:15,000 Well, a few people do. The most prominent is a Harvard scientist called R.V. Lowe. 198 00:15:16,000 --> 00:15:20,000 He says there is the potential that this could be an alien spacecraft. 199 00:15:21,000 --> 00:15:27,000 It looked very weird, unlike any comet or asteroid that we have seen before from within the solar system. 200 00:15:27,000 --> 00:15:36,000 It was ten times longer than it is wide, and also it exhibited a push away from the sun without showing any cometary tail. 201 00:15:37,000 --> 00:15:39,000 So it was definitely not a comet. 202 00:15:40,000 --> 00:15:51,000 Potentially, this object was artificially in origin and therefore potentially a message in a bottle telling us that we are not alone and perhaps not the smartest kid on the block. 203 00:15:52,000 --> 00:15:57,000 One thing that fascinates me about a Muammua is that it's dividing scientific opinion. 204 00:15:58,000 --> 00:16:00,000 And one thing that they're all divided about is its shape. 205 00:16:01,000 --> 00:16:07,000 Yeah, the shape's really unusual. It's not what we expected, although we don't know what to expect. The shape is exciting. 206 00:16:08,000 --> 00:16:10,000 And you talked to Nick Pope about this, didn't you? 207 00:16:11,000 --> 00:16:17,000 Yes, that's right. Nick Pope, former M.O.D. investigator and UFO expert, and not surprisingly, he had a lot to say about this. 208 00:16:18,000 --> 00:16:28,000 So Nick, one of the most significant sightings that we've had ever is a Muammua, which is the first interstellar object which has ever been detected in our solar system. 209 00:16:29,000 --> 00:16:37,000 And what kind of stumped scientist is its shape? We expected it to be spherical and to behave in certain ways, but what's your take on this, Nick? 210 00:16:37,000 --> 00:16:55,000 Well, I'm not a scientist, but when a Harvard astronomer says, I think there are a number of characteristics about this object that mean it may be not just interstellar, but actually artificial in origin, he gets my attention for sure. 211 00:16:56,000 --> 00:17:06,000 We know it's interstellar because it's travelling much faster. And it's completely dom-founded, many scientists, but what they've actually detected is that it's sped up as well as it's travelled through our solar system. 212 00:17:07,000 --> 00:17:13,000 And we can't explain what this is. Does this concern you, Nick? Does this worry you? 213 00:17:14,000 --> 00:17:24,000 It interests me. And again, I go back to what Avi Loeb said about a number of characteristics that he said pointed to artificial origin. 214 00:17:25,000 --> 00:17:33,000 I think he mentioned, for example, that he thought that the acceleration could not be explained by gravitational forces alone. 215 00:17:33,000 --> 00:17:44,000 I mean, when somebody of that calibre says, I think this thing could be, could be, you know, an extraterrestrial spacecraft, we should listen and we should test it. 216 00:17:45,000 --> 00:17:58,000 I mean, a few years ago, speculation like this would have been laughed out of court. The fact that we are now having a serious scientific debate about this, I think it's a sign of, my goodness, how the times have changed over the last few years. 217 00:17:58,000 --> 00:18:07,000 One thing which is significant when we look at humans exploring space is that if we want to go further, we're limited by the speeds that we can travel at. 218 00:18:07,000 --> 00:18:20,000 We haven't got the propulsion systems to enable us to travel incredibly fast. So if we were to go and develop the technology, we would actually need spacecraft, which are 100, perhaps even a thousand years, and you'd have generations on those spacecraft. 219 00:18:21,000 --> 00:18:30,000 Do you think there's a potential that that's something an alien civilization would do and this could potentially be a generational spacecraft from another civilization? 220 00:18:30,000 --> 00:18:37,000 Yes, some people have speculated that it could be some sort of generational spacecraft, or maybe it's unmanned. 221 00:18:37,000 --> 00:18:55,000 Maybe it's a derelict ship just drifting through the cosmos and it only activates itself when it comes into proximity of a solar system. This is all speculation, I admit, but it's all we can do. 222 00:18:55,000 --> 00:19:02,000 In your opinion, do you think there's a potential that alien civilizations know about us and they're watching us? 223 00:19:02,000 --> 00:19:15,000 Yes, completely. It only takes a civilization with perhaps a few tens of years, they'll own hundreds, thousands, millions, that absolutely they would be aware of us. 224 00:19:15,000 --> 00:19:28,000 It only takes a civilization with a bit more technology than us to probably spot us from halfway across the galaxy. So if they're out there, they've probably found us already. 225 00:19:32,000 --> 00:19:37,000 Well, being the only intelligent lifeform on this show, what do you think of that? 226 00:19:37,000 --> 00:19:46,000 I think it blows my mind. I think we know so little and it's frustrating because you always want to go a thousand years in the future and find out what we eventually know and we are. 227 00:19:46,000 --> 00:19:52,000 We're stuck here, we don't live long enough. Obviously at the moment we know the limit that you can travel at is the speed of light. 228 00:19:52,000 --> 00:20:02,000 There's so much we don't know, it's so frustrating, but it's also concerning the fact that we look at history and when civilizations have met, they've generally clashed. 229 00:20:02,000 --> 00:20:08,000 Why do we think it would be any different in space? Why do we think alien civilizations would be any different? 230 00:20:08,000 --> 00:20:20,000 Nick thinks we're close to finding them. Would the universe being so, well, infinite, what are the chances really? Because it's too big? 231 00:20:20,000 --> 00:20:25,000 We don't know, there could be like, look at microbial life, we could find microbial life on Mars. 232 00:20:25,000 --> 00:20:30,000 Yeah, but microbes are boring. Microbes are boring. Okay, I'll give you something more exciting. Okay. Fish. 233 00:20:30,000 --> 00:20:35,000 Oh! So, are you excited? A bit more. 234 00:20:35,000 --> 00:20:40,000 Jupiter has got this moon called Europa and Saturn has got this moon called Intellitus. 235 00:20:40,000 --> 00:20:49,000 They've got lots of other moons, but these two moons are very exciting. Europa has got an icy surface and beneath it, it's highly likely to have a liquid ocean. 236 00:20:50,000 --> 00:20:57,000 There is the raw ingredients there for life in this ocean of this moon and there could potentially be some sort of alien fish life there. 237 00:20:57,000 --> 00:21:02,000 We just don't know, we're about to send spacecraft there to begin the process of finding out. 238 00:21:02,000 --> 00:21:04,000 They're just getting really interested. 239 00:21:04,000 --> 00:21:11,000 Coming up. What do you think that the first aliens might not be biological beings, but perhaps robotic? 240 00:21:11,000 --> 00:21:19,000 Astrobiologists Dr. Natalie Cabrol adds fuel to the theory that a Muamua was an unmanned alien craft. 241 00:21:19,000 --> 00:21:24,000 Machines and robots are likely to be the first thing that we encounter. 242 00:21:24,000 --> 00:21:29,000 And the sheer scale of this investigation pushes me to my limits. 243 00:21:29,000 --> 00:21:31,000 That's what twists my melon. 244 00:21:31,000 --> 00:21:36,000 It's because the numbers are so big, it's almost impossible to imagine. 245 00:21:39,000 --> 00:21:47,000 Are we alone in the universe? Or somewhere out there, our intelligent beings staring into the night sky and asking the same question? 246 00:21:48,000 --> 00:21:53,000 There's little doubt in the scientific community that life does exist beyond our solar system. 247 00:21:53,000 --> 00:22:02,000 And with worlds shaking advances and how we search the depths of space, we may well be approaching the point of first contact. 248 00:22:02,000 --> 00:22:07,000 But some scientists believe that point has already been reached. 249 00:22:07,000 --> 00:22:15,000 When a Muamua, the mysterious interloper from deep space arrived in our solar system in 2017. 250 00:22:16,000 --> 00:22:26,000 Potentially, this object was artificially in origin and therefore potentially a message in a bottle telling us that we are not alone. 251 00:22:26,000 --> 00:22:38,000 Professor Loeb believed the peculiar features of a Muamua suggest it could be an alien probe sent to our solar system intentionally by an extraterrestrial civilization. 252 00:22:38,000 --> 00:22:41,000 But there are other theories too. 253 00:22:41,000 --> 00:22:50,000 Some people have speculated that it could be some sort of generational spacecraft or maybe it's a derelict ship just drifting through the cosmos. 254 00:22:50,000 --> 00:22:59,000 And it only activates itself when it comes into proximity of a solar system. 255 00:22:59,000 --> 00:23:09,000 The appearance of this remarkable object has divided the scientific community, with some convinced a Muamua was less rocket and more rock. 256 00:23:09,000 --> 00:23:19,000 But it doesn't really have any behavior that's so consistent with what you'd expect from a spacecraft vis-a-vis just an ordinary rock and asteroid. 257 00:23:19,000 --> 00:23:29,000 What is certain is this extraordinary investigation is forcing us to ask the really big question, are we alone in the universe? 258 00:23:30,000 --> 00:23:39,000 Okay, so Sarah has been trying to find out whether a Muamua is a rock or a rocky. 259 00:23:39,000 --> 00:23:49,000 We've been trying to find out if we are the most intelligent life form in the cosmos, in fact the only intelligent life. 260 00:23:49,000 --> 00:23:55,000 We could be completely alone in this vast universe or there could be loads of life out there, we just don't know. 261 00:23:55,000 --> 00:24:02,000 I mean the universe is so big it's like trying to find a needle in a haystack that's a billion, billion, billion miles long. 262 00:24:03,000 --> 00:24:13,000 The next step in our investigation is to take a closer look at the red planet, Mars, where the search for life is at full throttle. 263 00:24:13,000 --> 00:24:17,000 And we have some of the latest photographic images here in the hub. 264 00:24:17,000 --> 00:24:24,000 First of all that is Mars, that's been taken by the Perseverance rover, that's NASA's most recent rover to land on the red planet. 265 00:24:24,000 --> 00:24:33,000 We are hunting for signs of ancient microbial life on Mars, so this vast barren, dusty landscape might have once had very simple life. 266 00:24:33,000 --> 00:24:40,000 And if that life that we find on Mars isn't related to life on Earth, that means in our average solar system, 267 00:24:40,000 --> 00:24:47,000 two genesis is within our one average solar system, two worlds, which both have life forming independently of each other. 268 00:24:47,000 --> 00:24:54,000 So by finding microbial life on Mars, it helps us answer the question as to is there intelligent life out there. 269 00:24:56,000 --> 00:25:03,000 So, if I'm understanding this correctly, if ancient signs of microbial life are discovered on Mars, 270 00:25:03,000 --> 00:25:09,000 it will confirm that basic forms of life in the right conditions could evolve anywhere in the universe. 271 00:25:10,000 --> 00:25:16,000 What I want to know is how likely is it we'll find intelligent life? 272 00:25:16,000 --> 00:25:23,000 Because if a Muah-Muah is an alien ship, I'd hazard a guess, it's not being piloted by microbes. 273 00:25:23,000 --> 00:25:25,000 OK, so where are you going to take me now? 274 00:25:25,000 --> 00:25:31,000 Well, we're going to speak to an astrobiologist, her name is Natalie Cabral and she's from the SETI Institute. 275 00:25:31,000 --> 00:25:33,000 Hi Natalie, it's Craig and Sarah here. 276 00:25:33,000 --> 00:25:35,000 Hi. 277 00:25:36,000 --> 00:25:44,000 As well as being involved in the hunt for life on Mars, Dr. Natalie Cabral is also an explorer of extreme environments 278 00:25:44,000 --> 00:25:51,000 and has one mission to learn where we might find extraterrestrial life and what it will look like. 279 00:25:51,000 --> 00:25:55,000 With the universe being so big, how difficult is your job at SETI? 280 00:25:55,000 --> 00:25:59,000 There are more planets than stars in our galaxy. 281 00:25:59,000 --> 00:26:04,000 We probably have 400 billion planets in our galaxy. 282 00:26:04,000 --> 00:26:10,000 So I would say that on and on there are probably a lot of intelligent life out there. 283 00:26:10,000 --> 00:26:15,000 What are the chances that intelligent life has already reached this planet? 284 00:26:15,000 --> 00:26:17,000 This is my biggest wish. 285 00:26:17,000 --> 00:26:22,000 I wish so much that I could tell you today, yes, we already made contact. 286 00:26:22,000 --> 00:26:27,000 But I would caution people just to keep a simple logic. 287 00:26:27,000 --> 00:26:36,000 If you feel that an intelligent species has covered the billions of kilometers or light years to come and visit us, 288 00:26:36,000 --> 00:26:45,000 I doubt that it would be just to stack a pile of stone on top of each other or just to draw crop circles. 289 00:26:45,000 --> 00:26:50,000 Is it likely that it will ever happen in the next few decades, say? 290 00:26:50,000 --> 00:26:55,000 We are closer than we ever were and we are at the beginning of it. 291 00:26:55,000 --> 00:27:00,000 So it may be that there are other intelligent species out there that are way more advanced than we are, 292 00:27:00,000 --> 00:27:05,000 that know things that we don't and it may be that for them distances are not an issue. 293 00:27:05,000 --> 00:27:14,000 I mean, is there not a danger that an alien life force coming here, there's been war and disease and famine on their planet 294 00:27:14,000 --> 00:27:17,000 and they're trying to find somewhere else to call home? 295 00:27:17,000 --> 00:27:20,000 Like we would want to leave this planet because we've wrecked it. 296 00:27:20,000 --> 00:27:31,000 If aliens are coming because they're escaping these kind of problems, there are a couple of possibilities. 297 00:27:31,000 --> 00:27:39,000 First, if they land here, obviously they know a lot more in terms of propulsion and space travel than we do. 298 00:27:39,000 --> 00:27:43,000 So they are likely more advanced than we are. 299 00:27:43,000 --> 00:27:47,000 So at that point, we have to just hope that they are benevolent. 300 00:27:47,000 --> 00:27:55,000 Looking at the extremes that we know life can survive on and what we know about how diverse life is, 301 00:27:55,000 --> 00:27:59,000 can we speculate as to what aliens might look like? 302 00:27:59,000 --> 00:28:01,000 Ah, that's a good question. 303 00:28:01,000 --> 00:28:05,000 So, depends what type of aliens you are talking about. 304 00:28:05,000 --> 00:28:08,000 Are you talking about micro-ET or grown-up ET? 305 00:28:08,000 --> 00:28:11,000 Grown-up ET, let's get the bad boy. 306 00:28:11,000 --> 00:28:13,000 The bad boys first. 307 00:28:13,000 --> 00:28:17,000 Each world is a unique planetary experiment. 308 00:28:17,000 --> 00:28:24,000 So depending on your environment, you are going to develop a number of characteristics to interact with your environment. 309 00:28:24,000 --> 00:28:36,000 So you can expect that aliens will have either a brain or a neural box that gives them the possibility to interact with the outside 310 00:28:36,000 --> 00:28:42,000 and they will have eyes or cameras or something that allows them to see, to touch, etc. 311 00:28:42,000 --> 00:28:44,000 So you can go wild. 312 00:28:44,000 --> 00:28:51,000 What do you think the potential that the first aliens might not be biological beings but perhaps robotic? 313 00:28:51,000 --> 00:29:02,000 I think that it makes a lot of sense for an advanced civilization to be a machinery that's capable of reproducing itself and spread across space. 314 00:29:02,000 --> 00:29:11,000 So, but definitely machines and robots are likely to be the first thing that we encounter, I would say. 315 00:29:13,000 --> 00:29:15,000 Wow, there you have it. 316 00:29:15,000 --> 00:29:22,000 Dr. Natalie Cabraud believes the first alien encounter is likely to be with a machine. 317 00:29:23,000 --> 00:29:26,000 Could that machine be a moua moua? 318 00:29:26,000 --> 00:29:30,000 The truth is out there, but can we find it? 319 00:29:30,000 --> 00:29:36,000 The sheer scale of this deep space investigation is testing me in ways I'd never imagined. 320 00:29:36,000 --> 00:29:40,000 That's what twists my melon when we start doing stuff like this. 321 00:29:40,000 --> 00:29:45,000 It's because the numbers are so big it's almost impossible to imagine. 322 00:29:45,000 --> 00:29:48,000 Yeah, the universe is a stranger and you can imagine. 323 00:29:48,000 --> 00:29:52,000 It just blows my mind all the possibilities that could potentially be out there. 324 00:29:52,000 --> 00:29:57,000 One of Harvard's top astronomers actually believes this could potentially be an interstellar spaceship. 325 00:29:57,000 --> 00:30:02,000 It could almost be like a boiler notion that an alien civilization has sent out. 326 00:30:02,000 --> 00:30:04,000 It's not acting like anything we've ever seen before because it's actually speeding up. 327 00:30:04,000 --> 00:30:09,000 Yeah, and that's really unusual and it shapes so unusual because we know there are objects beyond our solar system. 328 00:30:09,000 --> 00:30:12,000 We know at some point they're going to pass through our solar system. 329 00:30:12,000 --> 00:30:16,000 We never expected these objects to look like this, so it's hugely surprising. 330 00:30:17,000 --> 00:30:23,000 The deeper we delve into this extraordinary case, the more perplexing and frustrating it becomes. 331 00:30:23,000 --> 00:30:32,000 What is without doubt and unanimously agreed by the scientific community is that a moua moua had highly unusual properties. 332 00:30:34,000 --> 00:30:36,000 It's bizarre elongated shape. 333 00:30:36,000 --> 00:30:44,000 It's inexplicable non-gravitational acceleration and the fact it entered our solar system at all. 334 00:30:46,000 --> 00:30:51,000 To try and find out more, we need to speak to the CEO of Zeti, Bill Diamond. 335 00:30:52,000 --> 00:30:54,000 Hi Bill, Craig and Sarah here. 336 00:30:54,000 --> 00:30:55,000 Hello Craig and Sarah, how are you? 337 00:30:55,000 --> 00:30:57,000 This is me and Sarah, we're just talking about a moua moua. 338 00:30:57,000 --> 00:31:00,000 What is the significance of a moua? 339 00:31:00,000 --> 00:31:08,000 It's certainly an interesting object and has garnered a lot of attention thanks in no small part to Abilow at Harvard. 340 00:31:08,000 --> 00:31:17,000 But although it had a seemingly an interesting sort of shape from what we can tell from literally one pixel worth of image data, 341 00:31:17,000 --> 00:31:27,000 but we could look at how that pixel changed in its brightness and we could also track its speed and its vector and direction of travel. 342 00:31:27,000 --> 00:31:33,000 Why do you think that some scientists have said this has got the potential to be an alien spaceship? 343 00:31:33,000 --> 00:31:43,000 I think the reason is that we expect certain phenomena that we observe to behave in certain ways that we can attribute to natural forces or phenomena. 344 00:31:43,000 --> 00:31:47,000 And when they don't, of course it gives rise to question, well why didn't this? 345 00:31:47,000 --> 00:31:57,000 If in fact this object was traveling with some characteristics that we felt were not what one would expect of a comet for example, 346 00:31:57,000 --> 00:32:01,000 why did this object seem to accelerate after it went around the sun? 347 00:32:01,000 --> 00:32:11,000 Even though it wasn't sort of a blading material which would act like a jet engine, pushing material up an object tends to push the object in the opposite direction. 348 00:32:11,000 --> 00:32:12,000 Why is it speeding up? 349 00:32:12,000 --> 00:32:19,000 Could one explanation be that this was in fact something mechanical or technological rather than something natural? 350 00:32:20,000 --> 00:32:26,000 Coming up, Bill Diamond is convinced that intelligent alien life is out there. 351 00:32:26,000 --> 00:32:35,000 It stands to reason that in other places life has had the chance to evolve into intelligence, certainly, and technology perhaps. 352 00:32:35,000 --> 00:32:39,000 Wow. And we close in on a final verdict. 353 00:32:39,000 --> 00:32:43,000 Amua Mua. Is it a rock or is it a rocket? 354 00:32:46,000 --> 00:32:57,000 We're on a mission to uncover the truth about whether Amua Mua, the mysterious object that was observed leaving our solar system on the 19th of October 2017, 355 00:32:57,000 --> 00:33:01,000 was sent intentionally by an alien civilization. 356 00:33:02,000 --> 00:33:13,000 When a Harvard astronomer says, I think there are a number of characteristics about this object that mean it may be not just interstellar, 357 00:33:13,000 --> 00:33:19,000 but actually artificial in origin, he gets my attention for sure. 358 00:33:19,000 --> 00:33:25,000 But over the course of our investigation, we've also had to confront the biggest question of all. 359 00:33:26,000 --> 00:33:34,000 Are we alone in the universe? And some leading scientists we've spoken to are convinced we aren't. 360 00:33:34,000 --> 00:33:41,000 There are more planets than stars in our galaxy. We probably have 400 billion. 361 00:33:41,000 --> 00:33:45,000 So I would say that there are probably a lot of intelligent life out there. 362 00:33:45,000 --> 00:33:53,000 If we are alone, well, that's remarkable. You can sleep better at night because that means that we are in fact a miracle. 363 00:33:55,000 --> 00:34:04,000 If intelligent life is out there, then that further raises the possibility that Amua Mua was sent to our solar system on purpose. 364 00:34:07,000 --> 00:34:13,000 We're speaking to Bill Diamond, the CEO of SETI, the search for extraterrestrial intelligence, 365 00:34:13,000 --> 00:34:21,000 who has serious questions around why Amua Mua was observed to perform an inexplicable acceleration. 366 00:34:21,000 --> 00:34:28,000 Well, why did this object seem to accelerate after it went around the sun, even though it wasn't sort of ablating the material, 367 00:34:28,000 --> 00:34:31,000 which would act like a jet engine? Why is it speeding up? 368 00:34:31,000 --> 00:34:38,000 Could one explanation be that this was in fact something mechanical or technological rather than something natural? 369 00:34:40,000 --> 00:34:45,000 Or the other alternative is, you know, there's something natural, but, you know, not something we've observed before, 370 00:34:45,000 --> 00:34:49,000 so we don't quite yet have the physics or mathematics to explain it. 371 00:34:49,000 --> 00:34:57,000 Bill, the search for extraterrestrial intelligence is like trying to find a needle in a billion-billion haystacks. 372 00:34:57,000 --> 00:35:01,000 Doesn't it become quite frustrating to do what you do? 373 00:35:03,000 --> 00:35:11,000 Well, not really. I mean, I think even the search for life in its most basic forms and perhaps quite nearby, 374 00:35:11,000 --> 00:35:13,000 the discovery would be profound in the extreme. 375 00:35:13,000 --> 00:35:23,000 If life is a common phenomena, it stands to reason that at least in some other places life has had the chance to evolve into intelligence, 376 00:35:23,000 --> 00:35:32,000 certainly, and technology perhaps. And while it is a bit of a needle in a haystack for sure, at least we know where in the haystack to look. 377 00:35:32,000 --> 00:35:41,000 We actually know which planets are sort of Earth-like, so now we can actually identify targets that are more interesting to look at more closely. 378 00:35:42,000 --> 00:35:45,000 Are we the most intelligent civilization in the universe? 379 00:35:45,000 --> 00:35:52,000 Is it really likely that, you know, Earth is the only place in our own galaxy where life has evolved and where intelligence has evolved? 380 00:35:52,000 --> 00:36:00,000 Doubt it. Very sincerely. But bear in mind that if we took the fastest spacecraft that humans have ever built and we sent it to Albus and Tori, 381 00:36:00,000 --> 00:36:04,000 a mere four light-years away would take 17,000 years for it to get there. 382 00:36:04,000 --> 00:36:10,000 You know, that's about four times the length of recorded human history, so it's a long way to go. 383 00:36:10,000 --> 00:36:11,000 Thank you very much. 384 00:36:14,000 --> 00:36:22,000 This case has blown my mind. It's the big stuff, the big question. But soon we must come into a final decision. 385 00:36:22,000 --> 00:36:31,000 Is a Muamua simply a shard of rocky debris? Or as others have hypothesized, is it alien tech? 386 00:36:32,000 --> 00:36:39,000 Before we come to our verdict, we need to reconsider everything we've discovered so far. 387 00:36:39,000 --> 00:36:46,000 So, the Muamua, the search for extra-terrestrial intelligence, what have we learned? 388 00:36:46,000 --> 00:36:51,000 We've learned there's an entire universe out there and we're only beginning to scratch the surface. It's full of possibilities. 389 00:36:51,000 --> 00:36:57,000 We've also learned that we're really tiny, really, really tiny in a vast universe. 390 00:36:58,000 --> 00:37:06,000 We had a fascinating conversation with senior, setty astronomer, Dr. Seth Shostak, who put things in perspective. 391 00:37:06,000 --> 00:37:12,000 There's a lot of real estate out there, right? There are like a trillion, trillion, with a D. 392 00:37:12,000 --> 00:37:20,000 Planets and moons in our galaxy alone, and we can see two trillion other galaxies, each with a trillion planets and moons. 393 00:37:20,000 --> 00:37:27,000 That's what twists my melon is, because the numbers are so big, it's almost impossible to imagine. 394 00:37:28,000 --> 00:37:35,000 And we learned that a proportion of these planets and moons could provide the right conditions for the evolution of life. 395 00:37:35,000 --> 00:37:43,000 We know that roughly one in five, one in five stars in the entire universe, potentially have Earth-like planets. 396 00:37:43,000 --> 00:37:49,000 And then we know that there's this equation known as the Drake equation, but basically says that a small fraction of those planets 397 00:37:49,000 --> 00:37:55,000 potentially can develop not only life, but intelligent life, which is capable of developing technology. 398 00:37:55,000 --> 00:37:56,000 Wow. 399 00:37:56,000 --> 00:38:03,000 So we know there's thousands of planets in our galaxy alone capable of hosting life, not just basic life, 400 00:38:03,000 --> 00:38:07,000 but potentially advanced technological civilizations. 401 00:38:08,000 --> 00:38:15,000 We also spoke to astrobiologist Dr. Natalie Cabrol, who's not only confident advanced ETs are out there, 402 00:38:15,000 --> 00:38:20,000 but they could even travel across the vastness of space to Earth. 403 00:38:20,000 --> 00:38:25,000 But maybe that there are other intelligent species out there that are way more advanced than we are, 404 00:38:25,000 --> 00:38:30,000 that know things that we don't, and it may be that for them distances are not an issue. 405 00:38:30,000 --> 00:38:35,000 We've learned that we are extremely tiny in a vast universe, as a whole, and we're not 406 00:38:35,000 --> 00:38:41,000 extremely tiny in a vast universe. There's a lot of possibilities, but at the moment the only life we know of is here on Earth. 407 00:38:41,000 --> 00:38:45,000 So all we know is we've got a lot of questions, but we haven't got the answers. 408 00:38:45,000 --> 00:38:53,000 I think we've also learned that mathematically it's more likely that there is intelligent life out there than not. 409 00:38:53,000 --> 00:39:03,000 So assuming intelligent life is out there, that further raises the possibility that a Muah Muah was sent here intentionally by aliens. 410 00:39:03,000 --> 00:39:10,000 Bill Diamond, CEO of SETI, agreed a Muah Muah has inexplicable properties. 411 00:39:10,000 --> 00:39:19,000 Why did this object seem to accelerate after it went around the Sun, even though it wasn't sort of a blading material, which would act like a jet engine? 412 00:39:19,000 --> 00:39:25,000 As well as the non-gravitational acceleration, a Muah Muah was a very strange shape. 413 00:39:25,000 --> 00:39:31,000 Features that have convinced Professor Avi Loeb of Harvard, it could be alien. 414 00:39:31,000 --> 00:39:40,000 It looked very weird, unlike any comet or asteroid that we have seen before, it was ten times longer than it is wide. 415 00:39:40,000 --> 00:39:45,000 Potentially, this object was artificial in origin. 416 00:39:45,000 --> 00:39:51,000 And even respected astronomer Dr Seth Shostak has been forced to consider the impossible. 417 00:39:51,000 --> 00:40:00,000 But there is a potential there, just a small chance that this is a multi-generational alien spacecraft, perhaps visiting somewhere else in our solar system. 418 00:40:00,000 --> 00:40:07,000 Yeah, it's possible. I like the idea of multi-generation spacecraft, because they get around the problem of traveling in space. 419 00:40:07,000 --> 00:40:14,000 But, you know, the speed at which the thing is going, it would have taken 70,000 years to get here. 420 00:40:14,000 --> 00:40:20,000 But the most interesting thing to me was something astrobiologist Dr Natalie Cabral said. 421 00:40:20,000 --> 00:40:31,000 I think that it makes a lot of sense for an advanced civilization to build machinery that's capable of reproducing itself and spread across space. 422 00:40:31,000 --> 00:40:38,000 So, machines and robots are likely to be the first thing that we encounter, I would say. 423 00:40:38,000 --> 00:40:44,000 If the first alien object we can expect to encounter is a machine, this fits with a Muah Muah, 424 00:40:44,000 --> 00:40:49,000 potentially being some kind of unmanned ET reconnaissance technology. 425 00:40:52,000 --> 00:40:59,000 So, in conclusion, we've established that extraterrestrial intelligent life very likely exists. 426 00:40:59,000 --> 00:41:04,000 In fact, the universe is probably teeming with life in all its forms. 427 00:41:04,000 --> 00:41:08,000 We just don't have the hard evidence yet. 428 00:41:08,000 --> 00:41:18,000 But now we must decide, was what is surely the greatest UFO of all time a Muah Muah alien or not? 429 00:41:19,000 --> 00:41:25,000 Okay, then. A Muah Muah. Is it a rock? Or is it a rocket? 430 00:41:27,000 --> 00:41:33,000 I'm going to go, I'm going to go out on this, because I want to believe it's a rocket. 431 00:41:34,000 --> 00:41:39,000 I don't think it is. I'm going to say it's a rock. 432 00:41:42,000 --> 00:41:49,000 With a Muah Muah, you know, it is likely to be a rock, but sometimes you have to be a little bit optimistic. 433 00:41:49,000 --> 00:41:53,000 So I'm going to go out on a limb and say, rocket. 434 00:41:55,000 --> 00:41:58,000 Whoa! You've changed me, Craig. 435 00:41:58,000 --> 00:42:13,000 Whether alien technology or a pristine shard of a distant planet, a Muah Muah has provided humans with our very first glimpse of what lies in distant solar systems. 436 00:42:17,000 --> 00:42:25,000 As this most extraordinary of all UFOs tumbles onwards towards the constellation Pegasus, it retains its secrets. 437 00:42:28,000 --> 00:42:36,000 But its visit has left us with a deeper sense of wonder at what further cosmic surprises await.