These enormous and powerful terrestrial crabs have an unexpectedly diverse "vocabulary." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Coconut ...

Imagine you’re a red-footed booby napping on a not-quite-high-enough branch of a tree. It’s nighttime on an island in the middle of the Indian Ocean, and you can’t see much of what’s around you. Then, ...