This microscope image made available by Matthew Dodd in February 2017 shows tiny tubes in rock found in Quebec, Canada. (Matthew Dodd via AP)
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Microfossils up to almost 4.3 billion years old found in Canada of microbes are similar to the bacteria that thrive today around sea floor hydrothermal vents and may represent the oldest-known evidence of life on Earth.Earth formed about 4.5 billion years ago and the oceans appeared about 4.4 billion years ago. If the fossils are indeed 4.28 billion years old, that would suggest "an almost instantaneous emergence of life" after ocean formation, Dodd said.The fossils appear to be older than any other previously discovered evidence of life. For example, other scientists last year described 3.7 billion-year-old fossilized microbial mats, called stromatolites, from Greenland.
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