A bizarre fossil called Prototaxites, which was the largest life-form on land 400 million years ago, may have been a completely unknown form of multicellular life, according to a new study.

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NASA’s Perseverance rover found possible signs of ancient life in rocks on Mars, keeping scientists up at night. NASA's Perseverance Mars rover took this selfie on July 23, 2024. To the left of the ...

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