Years of civil war and rampant poaching threaten hippos in Africa's Lake Edward. Fish stocks, which depend on hippo dung, have also plummeted, hurting local fishers.
The Arctic's killer whales are highly contaminated with man-made chemicals and are now considered to be the region's most toxic creatures, a new study reports.
Nearly 800 species of animals and trees eking out an existence in 595 sites around the world are in imminent danger of extinction, conservationists warn.
Mixing methods of an FBI dragnet with a San hunting party, researchers are using digitized animal prints to track and monitor rhinos and other endangered species.
A hydrothermal "megaplume" found in the Indian Ocean stretches some 43.5 miles (70 kilometers) long and is producing 100,000 megawatts of energy, scientists report.
New maps show food production now takes up 40 percent of the Earth's land surface, revealing the extent to which farming has changed the face of the planet, scientists say.
The recovery of Earth's ozone layer may take 15 years longer than anticipated, scientists warn, noting that old refrigerators and cars may be to blame.
Researchers have finished mapping the genome of the domestic dog, revealing clues about the animal's past and insights that could be used to fight disease in both dogs and humans.
Researchers have developed a way to create photographs with living bacteria, a feat they call an early success for the emerging field of synthetic biology.
A drought in the U.S. Southwest is causing the largest die-off of trees ever documented. And scientists say it's a warning of what global warning may hold in store.
