Sponge-like fossil could be Earth’s earliest known animal / Fósil parecido a una esponja podría ser el animal más antiguo conocido de la Tierra
Most major groups of animals first appear in the fossil record during the Cambrian explosion, 541 million years ago. But fossils resembling sponges found in northwestern Canada could be 350 million years older, significantly pushing back the date of Earth’s earliest-known animals.“If I’m right, animals emerged long, long before the first appearance of traditional animal fossils,” says geologist Elizabeth Turner, who found the fossils. Some scientists, however, are not convinced that the fossils’ branched, tubular patterns indicate an ancient sponge.
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https://www.nature.com/articles/d41586-021-02066-9?WT.ec_id=NATURE-20210...
