Little is known about the strange phenomenon of warm rain and ice, which in 2003 killed off thousands of musk-oxen and other animals that native people depend on for survival.

One of France's largest winemakers plans to begin production in Ethiopia, where an unusual climate allows farmers two grape harvests a year.

The Japanese government claims whalers were injured by activists hurling butyric acid produced by rotting butter. Video of the alleged incident hasn't been independently authenticated.

Get face-to-face with a frog-loving biologist who uses an unusual research tool—her tongue.

A big quake rocks Britain, the New York Philharmonic entertains North Korea, a galaxy is ablaze with new stars, and more.

Poisonous frogs don't deter biologist Valerie Clark, who often licks them as part of her research on the evolution of the amphibians' toxic defenses.

Learn the history of leap year—an age-old trick for keeping the calendar in synch with the heavens—and discover how cultures throughout history have made up for "lost time."

At 541 feet tall, the Singapore Flyer is the world's largest observation wheel. The island city's sudden thunderstorm wind gusts were a challenge for designers.

The dinosaur-era "sea monster" was bigger than a humpback whale and could have bitten a car in half, scientists say.

The futuristic entrance to the seed bank leads deep into a frozen mountain, where millions of seeds should be safe from war, warming, and other disasters.

Described as "the T. rex of the ocean," the dinosaur-era predator is one of the largest marine reptiles ever found, scientists announced today.

The eyelike markings on the wings of butterflies and moths are instead meant to scare off predators with their outrageous colors and patterns.

Scores of invasive rats on islands are hunting many seabird species into oblivion, a new study says.

Introduced rats are attacking seabird nesting colonies, eating eggs, and in some cases killing adult birds on hundreds of ocean islands, a new study says.

A type of hormone signals the Asian swallowtail caterpillar to mimic black-and-white bird droppings and later a green leaf, scientists have found.