The Insides of These Everyday Objects Are Totally Unexpected

A Tortoise Skeleton

This tortoiseshell exposes something that almost none of us knew: the turtle was attached to his hardened home the whole time! This is something that certainly isn't brought up in your elementary school biology course, but maybe it should be. It is way cooler than learning that mitochondria are the powerhouse of the cell, right?

The More You Know

There's such a thing as a fear of buttons.
Alexander the Great encouraged his men to shave so enemies couldn't grab their beards during battles.
Pilots and their co-pilots are required to eat different meals before flights so that they don’t both end up with food poisoning.
Dogs can learn up to 165 words.

Post originally appeared on Upbeat News.