"It's not nearly enough to find something that looks like a bacterial cell," Czaja said.
"There are nonbiological things that could look like that.
NASA scientists must be prepared to look for fossil evidence of bacterial life on Mars dating back three billion years when most of its atmosphere and possibly existing life vanished in the solar wind.
Fossils of early bacterial life more than 3.5 billion years ago have been found on Earth.
For the past two years, he has conducted fieldwork in Yellowstone's geyser basins to examine what elements are associated with bacteria that live in these geothermal pools. Some people think there has to be life on Mars," Gangidine said.
"Others think there certainly isn't life on Mars.
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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.–"Earth is Morphing into Venus" (WATCH Today's ' Galaxy' Stream) "Evolutionary Leap?" AI is Mimicing the Human Brain –"But Several Orders of Magnitude Faster and More Efficiently China Creates a Laser of Mind-Boggling Power –"Could Rip Space Asunder, Breaking the Vacuum" "Stop Saying That Dinosaurs Went Extinct."What we're trying to do is catch fossilization as it happens. And what happens to the trace elements we think are associated with them while they're alive?" Czaja's NASA advisory committee will meet in October to decide where on Mars they would like to send the rover among the three preferred destinations.