Protists may explain trace fossil evidence attributed to ancient animals
Thursday, November 20, 2008 - 14:42
in Paleontology & Archaeology
A new discovery challenges one of the strongest arguments in favour of the idea that animals with bilateral symmetry - those that, like us, have two halves that are roughly mirror images of each other - existed before their obvious appearance in the fossil record during the early Cambrian, some 542 million years ago...
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