Exploring our solar system
The Infinite Monkey Cage
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Are You a Human Being?
The rocks that Perseverance is exploring in Jezero Crater, they range from probably about three and a half billion years to as old as four. Not every environment on Earth or on Mars was capable of preserving the signs of ancient life. Salt minerals are really good for actually preserving and fossilizing signs ofAncient life here on Earth and presumably on Mars also.
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