There’s a muscle in some people’s forearms that humans don’t need. It doesn’t actually help us — but it is useful for some primates that scamper up trees.
We also have extra muscles around our ears that other animals use to figure out where a sound is coming from.
Oh, and there’s also a perfectly good reason that we get goosebumps — and why babies have tails a few weeks after conception.
Those are a few of the weird things about the human body that show our genetic ties with other mammals, according to this video from Vox.
“Your body is a temple, but it’s also a museum of natural history,” says narrator Joss Fong. “Look closely and you’ll find parts that aren’t there because you need them, but because your animal ancestors did.”
Check out the video below. Do you have this muscle?