Celebrate the first day of summer by learning how seashells form and what they can tell us Megan Kalomiris Not only is this regal murex seasnail shell stunning in appearance, but the stark contrast ...
Live Science on MSN
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.
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