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Can a turtle tuck its head all the way inside its shell?
Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think.
Turtles breathe backwards; that is, when they relax their diaphragms, they inhale rather than exhale. Martha Foley and Curt Stager discuss the... Jun 07, 2012 — Turtles breathe backwards; that is, ...
A 260 million-year-old fossil has been determined to be the oldest ancestor of turtles found to date, revealing something about the reptile's mysterious past. Michelle Starr is CNET's science editor, ...
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