A giraffe's long legs aren't just for height, they save energy by reducing how hard the heart works to pump blood upward ...

There are many purposes that spots and stripes serve in nature, but how they form has been more of a mystery to scientists.

Cardiopulmonary resuscitation (CPR) performed within five minutes of a child's heart stopping nearly doubled their chances of ...

Atrial fibrillation (AFib) is a cardiac disorder in which the chambers of the heart beat rapidly and irregularly. It's the ...