Harry Potter fans may soon disappear. That is, if they ever get their hands on the invisibility cloaks for which scientists have drawn up blueprints.

Magnetic propulsion, slingshot-like launchers, and other technologies are taking roller coasters to the edge of what the human body can handle.

A Chilean inventor has built a machine that he claims has extraordinary capabilities for finding buried objects, from bodies to treasure. But he won't say how it works.

Carved from volcanic rock, the rare 1,500-year-old box has vanished from a rain forest cave.

Adventurers searching for the source of the Nile River say they faced frightening crocodile attacks and a deadly assault.

Watch as an intrepid team patrols an isolated Brazilian park by boat, skirting raging currents and thundering falls and making contact with Indian tribes.

Olympic athletes hoping to win men's curling medals tomorrow can go to the games a tad wiser now that physicists may have solved one of the sport's biggest mysteries.

Researchers have developed an interactive computer system that uses artificial intelligence and gaming techniques to teach Arabic to U.S. soldiers.

Ski jumpers are honing their techniques in gale-force wind tunnels, in the hope of giving their performance a lift in the Olympics.

Two scientists at an Australian university are bringing the magic of physics to the public via a traveling stage show based on fairy tales.

Investigate the wildlife, peoples, and environment of the North Pole, and learn about the many expeditions that have explored the region, by foot, sled, plane—and blimp.

Squeezed into a six-figure shark costume, explorer Fabien Cousteau—Jacques's grandson—dove among great whites for the new TV special Shark: Mind of a Demon.

Can drinking your own urine improve your health? Meet a Native American healer who advocates "urine therapy" and the patients who take his unusual cure.

See the stunning images that the Hubble Space Telescope has beamed back to Earth, learn how it works, and explore the discoveries it has made on its historic mission.