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Oldest traces of life on Earth may not have been from ancient microbes afterall

from LiveScience

What were thought to be some of the oldest traces of life on Earth may not have been caused by life at all, new research suggests. The fossils, tiny tubules etched into ancient rocks in South Africa, were initially thought to be formed by ancient bacteria boring through volcanic glass in the seafloor — a process called bioalteration — during the Archean Eon, about 3.4 billion years ago. But the new study suggests these tiny tunnels were actually formed by the cooling of the volcanic rock nearby, just 2.9 billion years ago. more

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