Chinese scientists have, for the first time, cultivated a beating heart structure with human cells in a pig embryo, reporting that the heart continued to beat for 21 days unaided. The study, led by ...

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 ...

Rhythm is all around us and this week we're taking a look at its many different forms, from rhythms in music and poetry to those inside our bodies. NPR's Neda Ulaby has a story about art that is based ...