Hurricane Dean caused 20 deaths and billions of dollars of damage in Mexico and Jamaica-and may be a harbinger of additional powerful storms, forecasters say.

Despite its new "critically endangered" status, the Okinawa dugong might see even more of its habitat destroyed due to a U.S. airbase expansion, conservationists warn.

After ravaging the Yucatán Peninsula, the hurricane crossed the Gulf of Mexico and made second Mexican landfall with 100-mile-an-hour (160-kilometer-an-hour) winds.

The first Category 5 storm to make landfall in 15 years, Dean is expected to cause catastrophic damage as it crosses the Yucatan Peninsula.

The sea ice is melting much faster than computer models predicted, and may be gone altogether by 2030, experts say—prompting talk of a tipping point.

Refugee cattlemen in a popular Uganda reserve are poisoning predators to protect their livestock, government officials say—but the cattlemen claim otherwise.

Satellite imagery and scenes of destruction illustrate the first chapter of the storm's story as it heads for Mexico and the U.S.

Vampire bats in Latin America are turning their fangs on cattle as rain forest is being cleared to make way for livestock, new research shows.

Some 2,000 animals are undertaking a great migration—by truck—to repopulate a national park devastated by crime and poaching.

A controversial proposal to throw sulfur particles into the sky to combat global warming would create worldwide drought, a new study shows.

See a roundup of this week's news: India celebrates its 60th year of independence, London's Big Ben gets a cleaning, Mexico's Saint of Death gets a makeover, and more.

The magnitude 8.0 quake did not crack the ocean floor, which would likely have created a major tsunami, experts say.

Exclusive: Last month's gorilla "executions" are the result of a burgeoning illicit charcoal trade that includes government officials, wildlife rangers allege.

California's San Andreas Fault has long, straight sections that could send earthquakes zooming faster than the speed of sound, new research suggests.

A weakened tropical storm Erin may still cause flooding in Texas, which has already seen record rainfall. And a new threat, Hurricane Dean, is looming.