The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy ...

It seems like every week, there’s a new headline about some kind of sci-fi-esque organ transplant. Think eyeballs, 3D-printed kidneys, pig hearts. In her new book, Replaceable You: Adventures in Human ...

There are a few body parts that remain the same size from the moment we're born until the end of our lives. The human body is an incredible structure of balance, precision, and evolution. While most ...

As a kid of the 1970s, Mary Roach sat in front of the TV watching “The Six Million Dollar Man” promise a techno-rebirth. “We can rebuild him,” the narrator intoned. “Better than he was before. Better.

New research looks into how the retina and vascular system are connected. Retinal blood vessels can act like a window into heart health and overall health, including lifespan and aging markers, a ...

New research looks into how the retina and vascular system are connected. Retinal blood vessels can act like a window into heart health and overall health, including lifespan and aging markers, a ...