Dogs display a simple form of envy, refusing to do tricks if another dog gets all the glory. This is the first time a non-primate has been scientifically shown to feel jealousy.
A fairy fly's golden glow, "brainbows," and a beetle's iridescent eye region illuminated winning images of Olympus's BioScapes contest for microscope photography of animals, plants, and other life-forms.
White lions had nearly disappeared from the African plains. But a breeding program has proven successful, and these snowy cats are once again roaming free.
The white sturgeon, North America's largest freshwater fish, has bounced back in the Fraser River thanks to an unprecedented volunteer effort. Updated with video.
The quagga, a zebra subspecies that is only partly striped, has been crossbred back into existence after a hundred years of extinction, scientists say.
Growing up to 20 feet (6 meters) long, western North America's rare white sturgeon, is getting a boost from an alliance of officials, anglers, conservationists, and American Indians.
The developing discipline of "movement ecology" aims to explore why, where, when, and how organisms move through their environments. It could explain how salmon and sea turtles can return to their birthplaces after years away.
Illegal smugglers are increasingly hunting down leopards to satisfy China's demand for big cats, whose parts are used as decoration and in traditional medicine, conservationists say.
Despite months of warfare and no protection for 15 months, a mountain gorilla family in Congo has been found with five newborns on a volcanic mountainside.
Stunned by slavery and "the glories of the vegetation of the tropics," Charles Darwin explored Brazil's Rio de Janeiro state in 1832—a voyage now being retraced with the help of one of his great-great-grandsons.
