https://scitechdaily.com/ancestry-of-three-major-animal-groups-revealed-by-518-million-year-old-armored-worm/
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10/2/22 at 6:35pm
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A well-preserved fossilized worm dating from 518-million-years-ago resembles the ancestor of three major groups of living animals. An international team of scientists has discovered that a well-preserved fossilized worm dating from 518-million-years-ago resem…
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