A new dink frog discovered in southern Costa Rica sports different colors depending on its age and sex—a rare trait among frogs, a new study says.

"We don't think they are poisonous, but they certainly taste bad," an ecologist says of Australia's corroboree frog, an endangered species that has now been successfully bred in captivity. Video.

Gotham City has the Bat-signal; the "I've fallen and I can't get up" lady has her Life Call pendant; and now, mutant corn has a chemical to call for a hero when villainous vermin attack.

A loggerhead sea turtle seemingly injured by a shark was recently fitted with "trial" prosthetics as part of efforts to give the rare animal fully functioning flippers. Video.

Two expeditions—including one that sets sail next week—will visit the Pacific Ocean's garbage patch this summer to call attention to millions of tons of plastic pollution.

Vast swaths of North Africa are getting lusher, new satellite images show, suggesting a possible boon for people living in the driest part of the continent.

New smart-phone applications may enable the public to help scientists monitor invasive species and collect data in a fraction of the time it normally takes. Video.

Using diamonds and a laser, scientists crushed and heated methane produced from just water and minerals to create the same hydrocarbon blend found in natural gas.

Predicting global warming may have just gotten even harder. The swimming of ocean creatures may be as effective as winds or tides at ocean mixing—a process that plays a major role in shaping Earth's climate.

A new swarm of giant jellyfish is building up off China's coast, and experts are warning fishers in Japan to brace for an inundation like the one that devastated their catch in 2005.

Jellyfish that can grow up to 6.5 feet wide and weigh 440 pounds are poised to invade Japan. They are Nomura's jellyfish, and scientists and fishers who recall the last major inundation in 2005 are bracing themselves for the next potential wave.

The country's first ever nationwide tiger survey is a heartening sign for the Bengal tiger, which has dropped severely in number throughout its Asian habitat, conservationists say.

The single-celled organisms that set up house inside hard corals and give reefs their vibrant colors may be able to see, a new study says.

Stretching more than 2.7 miles long and soaring as high as 460 feet, a cavern in Southeast Asia is the biggest single cave passage yet found, British explorers say.

Millions of farmed and wild freshwater turtles end up in China every year, where they are eaten or used in medicine. A new Florida law aims to protect the reptiles in the wild.