07. Were there oceans on Mars a long time ago? If there was water, are there any signs of former plant life? What have we seen and learned about Mars from the rovers? (A K2S Question)

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The Spirit and Opportunity rovers on Mars discovered minerals on the surface that can only form in the presence of liquid water. This strongly suggests that Mars was once wet. The rovers have found no indication of plant life, but because liquid water is a key prerequisite for life, scientists infer conditions on Mars may have been habitable at some point in Mars' past. The Mars Global Surveyor has taken pictures of features suggesting that there may even be current sources of liquid water at or near the surface of the planet.

Answer provided by Laura Peckyno & Robert Peckyno


Image:K2S logosmall.jpg Question and Answer extracted from the book Kids to Space - by Lonnie Schorer


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