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the mars

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2020 mission with the perseverance rover

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and the ingenuity helicopter really

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resonates with us

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my students my research associates and

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myself

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in particular the jezreel crater which

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is the landing site

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for the perseverance rover it has been

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photographed previously by the mars

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reconnaissance orbiter

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in 2007 and showed evidence

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of an ancient delta within it the

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sediments containing the hydrous clay

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minerals

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and the carbonates at the crater site

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have been thought to be transported by

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water

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from nearby highlands billions of years

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ago

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in such a deltaic setting they would be

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favorable

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for the accumulation and preservation of

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organic matter

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and perhaps it would be a potential sign

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of life on mars

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as the mars exploration program enters

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the third decade

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the mars 2020 mission builds on the

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successes of the previous orbiters

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landers and rovers

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that have now firmly established the

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presence of

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sustained liquid water and habitable

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environments

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by addressing the key astrobiology

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question

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are there potential signs of past

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microbial life

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on mars or alternately are there bio

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signatures

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on mars that perseverance can detect

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now as we are gearing to send humans to

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mars

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and therefore there is now an even more

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urgent need

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to detect signs of extinct or extent

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life on mars before human presence

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contaminates the surface of mars the

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fiery red planet

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[Music]