Possible life found in sediments between 3.8 and 4.3 billion years old

Why Evolution Is True

The Earth is about 4.54 billion years old, and the oldest undisputed life on our planet appears as bacterial “microfossils” 3.5 billion years ago. But because bacteria are already quite complicated organisms, it’s a good bet that life (however you define it), began well before that. But how long? The seas weren’t around much before about 4 billion years (the Earth was too hot), and there was no oxygen. Life, if it existed about then, was probably adapted to extreme temperatures and was anaerobic (not requiring oxygen).

A new paper in Nature by Matthew Dodd et al. (free access, reference below) has reported what may be traces of life (iron-containing filaments and tiny tubes) that resemble the kind of life found in modern hydrothermal vents, as well as in undisputed microfossils. The age of the sediments, which are from Hudson Bay in Quebec, Canada, spans a range between 3.77 and 4.28 billion…

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