Recently, on a cold, sunny morning, I picked up a flowerpot and was pleased to find a brown, torpid lizard curled beneath it. At first the lizard’s coloration looked like a bad bruise of blotchy brown ...
How can you tell two species apart? You would never confuse a human with a chimpanzee, even with their shared ancestry. A manatee could never be mistaken for an elephant, despite their close relation.
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In a Costa Rican ...
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