The tiny yellow-green bird with a lilting song is thought to be endangered in its island habitat of Sulawesi, biologists say.

The recent slaying of three lions and up to four elephants in southern Kenya reflects the increasingly heated conflict between wildlife and the country's growing human population. Warning: graphic photo

As thick sheets of polar ice melt, they can release pent-up energy and trigger massive earthquakes, according to new study.

A recently enforced law will protect some nesting beaches for endangered leatherback turtles, but the reptiles still face threats from fishing practices, experts say.

Wild weather batters the United Kingdom, an imperial palace reopens in Rome, Brazilians fight police with bows and arrows, and more.

An unusually high wave crashed onto a boulevard in northwestern Spain, pushing people and cars aside. Much of Western Europe saw harsh weather this week.

A group that set up illicit mines and refineries amongst important Stone Age ruins are facing criminal trial, according to Chinese officials.

From the bright lights of Tokyo to the slums of Mumbai, see how the rapid urbanization predicted by a new UN report is affecting world population.

The legendary absence of snakes on the Emerald Isle has less to do with St. Patrick, its patron saint, than an ice-age chill followed by rising seas.

The U.S. government is tightening the amount of ozone—a main ingredient of smog—allowed in the air, but not by as much as scientists recommended.

Humans are about to become a majority urban species for the first time. Does this trend mean poverty or prosperity for the world's urban dwellers?

The powerful repellant temporarily jams an insect's sense of smell so that people don't register as food, according to a new study.

Water stored on land has thwarted a 1.2-inch (3-centimeter) rise in sea level due to global warming, according to a new estimate.

The flashy-looking frog hadn't been seen in 14 years, until scientists "rediscovered" it last month in the mountains of Colombia.

The bottlenose dolphin Moko swam up to two pygmy sperm whales stuck in a New Zealand sandbar and guided them back to sea, witnesses report.