The inventor sketched intricate muscular structures half a millennium ago. Turns out he was on to something.

In this video, Mikhail Varshavski, DO -- who goes by "Dr. Mike" on social media -- gives a history lesson on the heart, including cultural depictions and the evolution of our understanding of anatomy.

Leonardo Da Vinci was one of the first people to draw detailed sketches of human anatomy. His drawings showed that he noticed networks of muscle fibers on the inside of the heart. Da Vinci thought ...

We believe the human heart evolved away from the trabeculated structure seen in the other great apes to enhance its ability to twist and contract more efficiently. This increased twisting motion, ...

Mammals, from the mighty blue whale to the tiny shrew, inhabit nearly every corner of our planet. Their remarkable adaptability to different environments has long fascinated scientists, with each ...