The rapidly growing kangaroo population in Canberra, Australia's capital, has become such a public safety issue that scientists have devised a plan to curb the animals' numbers with a contraceptive pill.

New drugs, supercrops, and secrets of evolution may emerge from the fast-growing branches of the "Tree of Life," scientists say.

Watch footage of an octopus's fight with a spiny dogfish shark, and discover the culprit behind one aquarium's unusual murder mystery.

Modern-day raptors can kill and eat primates more than twice the birds' body weight, suggesting that ancient eagles could have hunted early humans.

Two species of the jumping insects can look the same to the naked eye. To tell them apart, one expert says, just use your ears.

Medical examinations confirm that Australian TV personality Steve Irwin died after a stringray pierced his heart during filming.

Now notorious for causing the death of TV's "Crocodile Hunter," the normally docile stingray uses its potentially lethal tail barb only when it feels threatened.

Looks like someone's been makin' Wookiee. Resembling nothing so much as Chewbacca's children, two of the world's smallest monkeys recently debuted at a Swedish zoo.

There are more species of venomous fish—some 1,200—than all other venomous vertebrates combined, new research suggests.

Despite ongoing turmoil between Israeli forces and Hezbollah, ecologists are finding time to give endangered sea turtles a boost in the Mediterranean Sea.

Marooned amid rising waters, many residents refused to leave their livestock, one of the most valuable assets in a country heavily dependent on agriculture.

Go beneath the surface with a pair of Antarctic divers and witness some of the world's oddest creatures: fish with "antifreeze," thousand-year-old sponges—perhaps even a new species.

Rat sperm grown in mouse testicles can produce healthy babies, scientists show. The new research has implications for genetic engineering and species conservation.

Watch video and animated stills of an elephant massacre near Chad's Zakouma National Park—evidence of a major poaching problem along the park's borders. Warning: graphic content

See stills and animated images from an aerial survey that has revealed evidence of a major poaching problem on the borders of one of the elephants' last central African strongholds. Warning: graphic images