Find out the happiest country in the world, not to mention the unhappiest country, and whether or not the world itself is actually happy.

From the man who memorized its first 70,000 digits to the insane true length of the number, these pi facts will make any math fan happy.

These famous inventors don't actually deserve credit for the inventions that made them famous. Here's who we should be remembering instead.

North Korean leaders isolate the country from the world in many ways, and controlling the Internet is one of their best methods of all.

This desert has been changed utterly in the last two decades, and it's still going on.

From auroras streaking through space to surreally beautiful views of Earth from above, these Scott Kelly photos show the wonders of spaceflight.

First up: leap year doesn't actually happen every four years.

From hot-air balloons on Jupiter to nightlife on a planet with no star, these images are truly out of this world.

See photos and hear the unlikely survival tale of the giant tree lobster insect, somehow the most romantic creature ever to terrify humankind.

All of these men were accused of heinous crimes, but all — thanks in part to their wealth, fame, and power — got away with it. These are some of the most enraging famous acquittals in recent history.

For decades, we've lived in fear of these six supposed carcinogens. But the facts behind these cancer myths reveal why none of them will actually harm us, and how these crazy claims first got started.