Update:  Cambrian Explosion Damage Control
				May 10, 2008
				Here’s an update to the “State of the Cambrian Explosion.”  Two years ago, our 04/23/2006 entry analyzed a lengthy paper in Annual Review of Earth and Planetary Sciences by Dr. Charles R. Marshall, a Harvard professor of biology and geology.  Dr. Marshall had taken on the arduous task of explaining, in evolutionary terms, the sudden […]