A jellyfish rots in days, so why did the first soft-bodied animals leave so many fossils?
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Summary
A jellyfish that washes up on a beach is gone within days, and nothing of it ends up in a rock. Yet the oldest animals known, soft-bodied creatures with no shell, bone, or tooth, left fossils so often that whole seafloor communities survive in stone. Half a billion years ago, the microbes that rot a …
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