The science circulatory system that sends so many European researchers to the United States flows in two directions, as most European governments run programs to attract US researchers as well. As ...

Your body's circulatory system is a wondrous thing. It's made up of blood vessels that carry blood to and from your heart and also pumps blood to your lungs so you can breathe. It helps grow and ...

Surgeons at Duke University have resuscitated a 'dead' heart on the operating table after it stopped beating for more than five minutes.