A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...

A new frog species has been discovered hopping around South America - with nothing to hide. The Guajira Giant Glass Frog lives on an isolated mountain range in Colombia. It's described as a ...

For the first time, surgeons have successfully performed a remarkable new heart transplant in which the donor organ never skips a beat in the process, reducing the damage that can occur during such a ...