All rainbows are 'raincircles' caused by water droplets separating white sunlight into a spectrum of colors, but Earth's surface blocks the bottom half of the circle from our line of sight.

Humans tend to imagine aliens as humanlike, but that's probably unlikely. Three different hypothetical planets show how aliens' bodies could take many forms.

Let your mind wander while watching this livestream of brown bears chilling in the waters of Alaska's Katmai National Park.

On planets in systems with two stars, such as the fictional Tatooine from 'Star Wars,' observers would see overlapping rainbows and double rainbows.

A 1980s soap opera helped popularize Napa Valley, broadcasting the idyllic wine country to millions of American viewers every week.

Watch the first appearance of 'Looney Tunes' characters Wile E. Coyote and Road Runner.

'Weight cycling'—when someone repeatedly loses and gains weight—can harm an individual's metabolism.

Fast-food prices have increased more over the past 10 years than both full-service restaurants and inflation.

King George III drafted a letter of abdication during the American Revolutionary War.

Clue, the murder-mystery board game, was designed during World War II air raids.

China doubled its nuclear stockpile between 2020 and 2025, with plans for further expansion.

The word 'coupon' comes from a French word meaning 'to cut.'