Evidence is mounting about what may be a wealth of organic molecules - a potential indicator of life - on Mars, with new findings from NASA's Perseverance rover suggesting the presence of a diversity of them in rocks at a locale where a lake existed long ago.
The latest evidence comes from an instrument called SHERLOC mounted on the six-wheeled rover's robotic arm that enables a detailed mapping and analysis of organic molecules. Researchers are reporting SHERLOC's findings from 10 places on two geological formations on the floor of Jezero crater.
Mars has not always been the inhospitable place it is today, with liquid water on its surface in the distant past. Scientists suspect that microbial life once could have lived in Jezero crater. They believe river channels spilled over the crater wall and created a lake more than 3.5 billion years ago.
The researchers do not know the specific organic compounds that SHERLOC detected, but have some clues. Study co-author Ryan Roppel, a University of Pittsburgh graduate student in chemistry, said the chemical signatures could come from compounds like benzene or naphthalene.
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