The shells of chelonians—think turtles, tortoises, and sea turtles—grow in layers, keeping a time-stamped record of environmental conditions. Uranium has shown up in the layers of turtles’ and ...

This one-ton turtle once ruled South America’s rivers — until a changing planet proved too much for even the largest ...

Now, similar 3D technology is being used to scan the loggerhead. She has gone from 90 to 200 pounds, but she still has the same 3D-printed brace that goes on her shell made. Aquarist Kaelie Spencer ...