See the newfound species—one with a bold streak, one with a "ballistic" tongue, and one no longer than a fingernail.

Previously unknown amphibians have been discovered during expeditions to a remote region of Costa Rica, scientists have announced.

Quebec City celebrates 400th anniversary, Chile volcano erupts, Kenya reels under violence, Brazilians honor sea goddess, and more.

A climber rescued earlier this week returned to an Australian mountain Thursday to save his dog, a 143-pound (65-kilogram) bullmastiff.

First a python eats an alligator (and explodes), then another swallows a pregnant sheep (but not for long), and yet another ingests an electric blanket. Now this.

One northern state plans to train unemployed youths to sterilize the hordes of monkeys that have migrated to farms and cities after losing their forest habitat.

A chemical trick has triggered a co-evolutionary arms race between parasitic Alcon blue butterflies and Myrmica rubra ants in Denmark, a new study says.

A veterinarian in Australia removes four golf balls from a python that mistook them for chicken eggs.

Millions of the tiny creatures are boring into the uninhabited island of Hoboro, and some experts suggest the landmass may be gone within a century.

The delicacy is a status symbol in fast-growing China, where demand has caused a startling drop in the number of sharks in the Atlantic.

The 17-year-old who was killed by a tiger at the San Francisco Zoo was trying to distract the animal to save his friend, police say.

Rapid warming of the Antarctic Peninsula is decimating local populations of the tiny birds, which rely on winter sea ice to feed.

Shorter winters and shrinking ice caps are threatening many Arctic birds and mammals, Finnish experts say.

Pacific salmon are colonizing Atlantic waters off Argentina, posing a serious threat to penguins and other native wildlife that compete for food, experts say.

Bamboo-dependent pandas competed with ten-foot apes—and maybe even early humans—for food and territory in ancient China, scientists familiar with new fossils say.