Add Yahoo as a preferred source to see more of our stories on Google. You know the feeling. When you first see your crush and your head starts spinning, your palms ...

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

Your heart has been doing its job faithfully for years, beating steadily in the background while you go about your daily life. Then suddenly, you become acutely aware of every beat as it seems to ...

Researchers discover that heart cells in developing zebrafish start beating suddenly and all at once Becoming a full-fledged organism out of a handful of cells, complete with functioning tissues and ...

New study reveals that heart cells in zebrafish start beating suddenly and all at once to form a synchronized heartbeat. In developing zebrafish hearts, each cell can beat on its own, and unlike in an ...