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.

Despite centuries of study, scientists are still finding new details and even overlooked structures within the human body. As researchers explore anatomical differences between individuals, it’s ...

How did your heart form? What triggered your first heartbeat? To this day, the mechanisms of human heart development remain elusive. Researchers know the heart is the first organ to fully function in ...