What came before the Cambrian period?

Precambrian fossils, once thought to be embryos, reinterpreted as… something else
http://arstechnica.com/science/news/2011/12/precambrian-fossils-once-thought-to-be-embryos-reinterpreted-as-somethign-else.ars

Since the Cambrian period basically represents the first time organisms contained hard body parts (soft body parts very rarely fossilize), a lot less is known about the pre-Cambrian period. What fossils they do find tend to be light on detail and difficult to interpret, so the article mentioned above isn’t that unusual. Fortunately, this isn’t a politicized subject and academic investigators can be wrong without winding up being vilified on the front pages of magazines.

Author: Tfoui

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