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one of the many challenges that we face

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on our mission to mars

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is how our brain will adapt to the

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changes in gravity it could take up to

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six months to get there but here's the

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problem the more time you spend in space

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the longer it takes your brain to

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re-adapt to gravity so what does that

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mean landing on mars after being

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weightless for six months you have

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trouble walking straight your vision is

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affected poor eye hand coordination

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motion sickness dizziness vomiting some

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people don't even want to move

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landing is one of the most critical

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aspects of the journey so how will this

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impact our trip to mars first of all

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landing on mars will require good eye

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hand coordination and perception so say

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you have a safe touchdown but there's an

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emergency situation and you have to exit

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the vehicle if you can't function it

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could be a pretty dangerous situation

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this is just one of the human challenges

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we'll face on a mission to mars we don't

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have all the answers yet but we do have

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the key the international space station

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every day aboard we're learning more and

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more about how our bodies adapt to

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weightless environments and

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gravitational transitions we're going to

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mars it won't be easy but because of the

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research that we're doing today on the