This one-ton turtle once ruled South America’s rivers — until a changing planet proved too much for even the largest ...
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 ...
AZ Animals on MSN
Why some animals never stop growing—and what stops them
Most animals reach an adult size, then spend the rest of their lives maintaining it. After maturity, their energy goes toward ...
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