Monday, 18 December 2017

Diverse microfossils suggest extraterrestrial life should be widespread

A sliver of 3.5 billion-year-old rock, being studied on the SIMS instrument

The early years of Earth are a murky mess, so we don't really know how or when life first arose. With each new fossil discovery, the timeline for life is pushed back earlier and earlier, but the really old ones are usually up for debate. That was the case for microscopic fossils found in Western Australia decades ago, which appeared to show evidence of life dating back almost 3.5 billion years, but those findings have since been contested. New analysis shows that the microfossils are indeed biological, and the find may have implications for the likelihood of extraterrestrial life.

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