Scientists at the University of North Texas report a breakthrough in building tiny, lab-grown replicas of human organs. These replicas, called organoids, can mimic some functions and structures of ...

Researchers have reported growing hearts containing human cells in pig embryos for the first time. The embryos survived for 21 days, and in that time their tiny hearts started beating. The findings ...

Science writer Mary Roach is fascinated by the human body, especially, she says, the "gooey bits and pieces of us that are ...

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 ...

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 ...