Fossil evidence of how the earliest life on Earth came to be is hard to come by. But scientists have come up with a few theories based on the microbes, viruses and prions existing today.
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How ancient microbes survived in a world without oxygen has been a mystery. Scientists discovered a living microbial mat that uses arsenic instead of oxygen for photosynthesis and respiration.
This summer, NASA’s Mars Perseverance rover is taking the next giant leap in our search for signs of life beyond Earth.
Following NASA’s latest discovery of organic matter on the red planet, new findings in a salt lake in California could point to where to look for alien life.
Top contributors
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Australian Research Council Future Fellow, The University of Western Australia
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Senior Lecturer in Earth System Science, Northumbria University, Newcastle
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Senior Lecturer in Geology, University of Aberdeen
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Associate Professor, UNSW Sydney
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Associate Professor of Planetary Science, Western Washington University
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Associate Professor of Planetary Science, Purdue University
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Professor of Marine Sciences, University of Connecticut
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Adjunct Professor of Chemistry, Quinnipiac University
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Professor Emeritus of Microbiology, University of Connecticut
