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Solar radiation split most of its surface water into its elemental parts nearly 3 billion years ago when the red planet lost its protective magnetic field.
But scientists are debating whether life might exist somewhere deep underground, among pockets of water trapped around geothermal areas similar to Yellowstone's geysers.
But if you have a cascade of traits — this and this and this added together — it's hard to explain it any other way except for life." The Daily Galaxy via University of Cincinnati Most Popular Space & Science Headlines Stephen Hawking's Great Question –"Why Isn't the Milky Way Crawling With Mechanical or Biological Life?
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Geologists like to go back to the same places over and over to ask new questions," Czaja said.
The rover will collect samples in sealed containers for shipping back to Earth in a later mission.
And the first question will be how life on Mars compares to life on Earth, said Andrew Czaja, an assistant professor at University of Cincinnati, who serves on a NASA advisory committee that will decide where on Mars to send the next remote-controlled rover. The advisory committee has narrowed the list of landing-site candidates to three and will recommend a finalist later this year.
The image above is an artist's impression of Mars four billion years ago. Kornmesser) Meanwhile, doctoral candidate, Andrew Gangidine is studying microbial life in silica hot springs in Yellowstone National Park to come up with a useful indicator of life on Mars.
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If similar life ever existed on Mars, NASA has a chance of finding a fossil record of it.
Researchers at the University of Cincinnati are atempting to help scientists put to rest one of our most fundamental mysteries. If NASA does find evidence of life on Mars, that might suggest that sparking life from a primordial soup isn't so extraordinary after all. Among other objectives, the rover will look for evidence that life once existed on the red planet.
"We can look at life being preserved in these silica deposits today.
We have evidence of this happening throughout geologic time," Gangidine said.