It's hard to get a bearing on the kind of organisms that existed before life absolutely exploded onto the scene during the Cambrian Period. Fossils from the Ediacaran Period before that are relatively scant, since lifeforms hadn't yet evolved the kinds of shells and body types that fossilize easily, but they did leave other traces of themselves behind. Now, paleontologists have discovered a set of tiny fossilized burrows, created by some of the earliest complex organisms more than half a billion years ago.
.. Continue Reading Half-billion-year-old fossils were left by the earliest complex lifeformsCategory: Science
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