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All Life On Earth Has One Single Ancestor. It Vanished Without a Trace.
(www.popularmechanics.com)
General discussions about "science" itself
Be sure to also check out these other Fediverse science communities:
Tldr: most likely, microbiology was first living thing on earth and as they have no bones they “leave” without trace (fossils). That there really is a common ancestor is not at all proven based on the linked article…