The mass extinction at the boundary between the Cretaceous and Paleogene periods was catastrophic, wiping out much of life on ...

Techniques developed to study the distant past—from dating ancient artifacts to reconstructing climate records in ice ...

Learn how researchers use archaeological techniques to show how sea turtle shells grow in layers that capture chemical clues ...

By studying the chemical fingerprints inside each layer, scientists have been able to learn about the turtles’ lives and the ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The broad-shelled river ...

CONSIDER the floating fortress that is a sea turtle. It seems to fly gracefully through the water even though it is encased in heavy armour. This combination of poise and protection evolved like any ...

Sea turtle shells record life history layer by layer over many years, clearly revealing diet, stress, movement, and ocean ...

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 ...