A new study published online in the Proceedings of the National Academy of Sciences shows that the Chicxulub asteroid collision, widely thought to have killed the dinosaurs, led to a devastating mass extinction of snakes and lizards, including seven newly identified lizard species and two snakes. In the foreground, the carnivorous lizard Palaeosaniwa stalks a pair of hatchling Edmontosaurus as the snake Cerberophis and the lizard Obamadon look on....
