Birds from the Cretaceous period went out the same way as the dinosaurs…

For years, paleontologists have disagreed over whether birds from the Cretaceous period went out with a whimper — dying out gradually over the course of millions of years — or with a bang — getting wiped out by the same mass extinction event that is believed to have killed off Earth's most recent (and final) wave of… » 9/19/11 2:00pm 9/19/11 2:00pm

Extinction of the Old, Evolution of the New: What really happened to…

In the following essay, Greg Laden muses on the glacial pace it takes for geological theories to be widely accepted and the difficulty of pinpointing exactly when the dinosaurs went extinct. » 5/27/10 1:48pm 5/27/10 1:48pm

Extinction Events That Almost Wiped Out Humans

It turns out humanity has been almost wiped out a few times in our distant past. How did it happen, and what does it mean for the future of human evolution? » 3/25/10 5:30pm 3/25/10 5:30pm