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Pikaia

NMNH-USNMPAL57628Pikaia2
Photo credit: Bruce Martin, CC0, via Wikimedia Commons.

Fossil Friday: Cambrian Fossils Turned Upside Down Yet Again

Most of these reconstructions are based on very weak evidence and are highly speculative. Read More ›
Cambrian 16
All photos in this article are by David Coppedge.

Smithsonian Glosses Over the Cambrian Explosion

The nation’s museum cannot ignore the collection of fossils Walcott sent them from the Burgess Shale. But can they explain them away? Read More ›

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