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 ...

Science writer Mary Roach is fascinated by the human body, especially, she says, the "gooey bits and pieces of us that are performing miracles on a daily basis." Take the human heart, for instance. If ...

Surgeons have developed two low-cost techniques to revive the hearts of people who wish to donate their organs after they die. The methods have been tested on only a small number of people, but they ...

Researchers have developed a promising synthetic heart valve that may eventually be used for growing children. Harvard’s Wass Institute and John A. Paulson School of Engineering and Applied Sciences ...