In a phone call the seller, who claimed he works in Denmark with his wife and that the cubs are in Iceland, said the cheetahs are 'very, very safe' and will grow no bigger than a dog.

Scientists say they have found a big indicator of how long you’ll live. The data suggest that genetics may be the biggest influence on lifespan. Experts stress that a healthy lifestyle still matters.

Editor's note: Follow Olympics opening ceremony live updates from Milano Cortina. Over the next few weeks, the sports world zeros its attention on Italy as more than 3,000 athletes from 93 countries ...

Can NASA and Elon Musk get us to Mars and beyond?

The wrinkly rodent barely seems to age and appears almost impervious to cancer, heart disease, and mental decline. Can these astounding abilities be adapted for humans?

Think of strength as insurance. Maybe you don't care about how much you can lift, but you should want to know how to get stronger so you can live life to the fullest. Strong legs help you kick a ball ...

In the oceans and on land, scientists are discovering rare, transitional organisms that bridge the gap between Earth’s simplest cells and today’s complex ones.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The Superbowl ad starts off with Shat declaring he’s “bringing fiber to the masses” before getting an ...