Did life start on Earth or in the stars? Scientists weigh in on 3 main theories – and believe they are close to uncovering the answer
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It’s a paradox: Life needs water to survive, but a world full of water can’t generate the biomolecules that would have been…
Purple microbial mats offer clues to how ancient life functioned. Pieter Visscher, CC BY-ND Billions of years ago, life on…