Valentine's Day is all about the hearts: heart-shaped chocolates, cards, balloons and even pizza. But the heart hasn't always ...

During an average lifetime, the human heart will beat more than 2.5 billion times. Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump ...

View Full Profile. Learn about our Editorial Policies. The simple, constant rhythm of a beating heart is a reassuring sign of life. With each lub-dub, blood brings life-sustaining oxygen throughout ...

as it can revive hearts after they've stopped beating. Story and editing by Chelsea Pineda More from Science The longer a heart is cut off from oxygen and blood flow, the less likely it is to ...

Heavy rains could bring flash flooding and debris flows, especially in burn scar areas. Officials advise staying off the roads Thursday during the peak of the storm.