Animals and humans share a profound and often unexplainable bond. From Jane Goodall’s groundbreaking work with Tanzanian chimpanzees to Dian Fossey’s unforgettable rapport with mountain gorillas, ...

We all know the phrase “died of a broken heart” — it's that poetic-sounding (but very real) heart condition triggered by deep sadness or grief. But here’s something wild: did you know your heart can ...

It's only about the size of your fist. Yet it pumps about 2,000 gallons of blood throughout your body every day. If you could stretch out the complex network of blood vessels in your body through ...