Leaf through a textbook, watch a wellness influencer, or listen in at the gym, and it can feel as though the human body has already been mapped to exhaustion. Every muscle named, every nerve traced.

The film discusses the human skeleton and muscles through the perspective of a college student explaining to his younger brother. It covers the structure and function of bones, including their ...

Even tiny muscles around the ears hint at our evolutionary past. In many mammals, tiny ear muscles allow the outer ear (pinna ...