Cartoons often suggest turtles wear shells like removable armor. Those stories show turtles stepping out, swapping shells, or treating them like clothing. Biology disagrees. A turtle shell is not an ...

The asteroid impact at the end of the Cretaceous period caused one of the largest mass extinctions in Earth's history. But some organisms defied the catastrophe. For turtles, the chance of survival ...

The mass extinction at the boundary between the Cretaceous and Paleogene periods was catastrophic, wiping out much of Life on Earth. Vertebrate groups that dominated at the time, such as dinosaurs and ...