We can update Stephen Meyer’s tabulation to report that 21 of the 28 phyla with fossil records first appear in the Cambrian explosion.
A video offers some of the standard weak and inadequate explanations we’ve seen in the past.
The common theme among each of these “solutions” to Darwin’s dilemma is that none of them explain the origin of biological information.
I thought I would excerpt here the section (pp. 392-398) from Darwin’s Doubt in which Meyer explains Asher’s main objection and responds to it.
The Cambrian explosion isn’t the only explosive event in the fossil record that disturbed Charles Darwin.