(CN) — If you’re ever in the rain forests of Colombia, don’t expect to see any glass frogs hanging out; the tiny frogs are masters of camouflage, thanks to their transparent skin. The glass frog, ...
As tiny glass frogs fall asleep for the day, they take almost 90 percent of their red blood cells out of circulation. The colorful cells cram into hideaway pockets inside the frog liver, which ...
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