Adam Cole

Popcorn has been around at least 4,000 years. The Aztecs even had a word for the sound of kernels popping — totopoca. On National Popcorn Day, ponder the story of this beloved snack.

A century before militants seized Malheur National Wildlife Refuge, two photographers visited Malheur Lake. Their hand-colored images persuaded Theodore Roosevelt to protect the area's wildlife.

Less than 1 percent of applicants make the cut. But there's more than one way in. Passion helps. Be persistent. Oh, and be tops in what you're doing right now.

Skunk Bear's shivery new video explores how and why our skin acts so weird when we watch a scary movie, get cold or listen to music.

Humans are pathetic at athletic feats compared to animals. We get outrun by ostriches and outswum by penguins. But human physiology makes us aces at one sport: endurance running. Sorry, horse.

In the 1960s, Chairman Mao Zedong ordered scientists to find a malaria antidote to help ailing soldiers in North Vietnam. Today's Nobel Prize for medicine went to one of those researchers.

Scientists spent decades arguing that women weren't suited for space travel because of menstruation. Even now, a lot of us are wondering how astronauts manage that time of the month.

In Earth's history, there have been some incredibly large animals that look sort of like animals we have today, just a lot bigger. In North America, there was a sloth that was the size of an elephant.

A dragonfly with a 2-foot wingspan? A sloth the size of an elephant? Skunk Bear's latest video introduces the enormous, ancient relatives of modern animals — all in rhyming verse. Of course.

Skunk Bear's latest video celebrates the hundreds of pictures taken by the New Horizons space probe over the past decade.