The massive asteroid that slammed into Earth some 66 million years ago is often—and understandably—considered a vicious killer. But new research into the cosmic effects of the impact suggest quite the opposite. That deadly asteroid might have actually blasted life throughout the solar system.
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…
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.
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?