Sleep helps our brains and bodies rest. Lots of animals need sleep to survive, like birds, mice and even humpback whales! But what about insects, like butterflies? Do they doze off, too?  We asked insect expert Meredith Cenzer to help us find the answer.Got a question fluttering around in your brain? Send it to us at BrainsOn.org/contact, and we won’t sleep on it!