The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian Explosion saw an incredible diversity of life emerge, including many major ...

The Cambrian explosion may have happened much earlier. The study quantitatively indicates that organisms with slender body profiles thrived around 545 million years ago.

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New 'Dune'-like Selkirkia worm species rewrites ancient history : Short Wave 500 million years ago, the world was a very different place. During this period of time, known as the Cambrian period ...

The Cambrian explosion is often presented as a chaotic moment in early evolutionary history (Image credit: canbedone via Getty Images) A cursory flip through any high school biology textbook will ...

Comparisons between the new Cambrian tunicate Megasiphon thylakos (a,b) with some modern tunicates (c,d,e). The modern species represented are c: Ciona, d: Ascidiella, e: Molgula.

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A newly described creature from the Cambrian period is putting a bizarre twist on what we thought we knew about early animal evolution. Meet Mosura fentoni—a three-eyed, clawed, and flappy ...