Was Spriggina an Evolutionary Ancestor of Arthropods?
For those wedded to an evolutionary interpretation of life’s history, the fossil and genetic evidence leave the origin of arthropods a major mystery.
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?
Alleged Refutation of the Cambrian Explosion Confirms Abruptness, Vindicates Meyer
The top-down pattern of appearance of animal phyla during the Cambrian explosion represents major conflicting evidence for Darwinian evolution.
Cambrian Explosion Blues
Here’s a sampling of the latest speculations about the Cambrian explosion.