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

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

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

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 ...