The Mars Meteorite - Is That Life?

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Scientists thought that they had discovered tiny martian life inside a meteorite. But now many scientists think that what looked like fossilized bacteria was actually shaped by geo chemical interactions between water and rock. It's also possible that we might find life in these rocks and not recognize it. For us to have the best possible shot, we need to get the rocks back to earth. All those bits of information need to be collected together and analyzed as a whole.

Mars was once a very different planet, with rivers, lakes, and — potentially — life. NASA’s latest Mars rover is on a mission to find traces of past life. What happens if it does?

This is the third episode of our new four-part series, Lost Worlds.

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