Less than two weeks before the Olympics, heavy smog in Beijing has Chinese officials blaming natural factors, such as fog. But others say athletes "have reason to be concerned."
The rapidly warming Arctic may be given a brief reprieve by North American wildfires, which lower surface air temperatures for weeks or months at a time.
The guillemot, a seabird that depends on ice, is losing its habitat and falling prey to polar bears desperate for food. Part of Wild Chronicles' Climate Connections series.
Unprecedented footage captures a great white shark off the coast of South Africa breaching the water's surface to snare a seal during nocturnal hunting.
The total length of the underground calcite river is still unknown, though a recent expedition surveyed several thousand more feet of the odd formation in New Mexico Cave.
By turns spacey, electric, and just plain cute, fuel-saving car designs from Ford, Saab, Mini, and others took center stage at the British International Motor Show.
The strengthening Category 2 storm, expected to make landfall at the U.S.-Mexico border today, has helped make July 2008 already the third most active month on record for hurricanes.
Growing evidence suggests an exploding comet-based meteorite laid waste to Russia's Tunguska region in 1908, scientists said at a recent scientific meeting in Moscow.
Lightning crackles, a storm makes its power felt, and more in our new weekly roundup of weather shots, natural disaster images, and other nature news photos.
The loss of Mexico's coastal mangrove forests to development is threatening the country's multimillion-dollar fishing industry, according to a new study.
A new population of the highly endangered greater bamboo lemur has been found in east-central Madagascar wetlands, hundreds of miles from its forest-dwelling relatives.
Gulf Coasters cleared yards and bought plywood and flashlights, as approaching storm Dolly neared hurricane status. National Guard troops were mobilized in preparation for expected flooding.
Hot sand is hard-boiling eggs of some rare turtles in Costa Rica, spurring efforts to counter this and a host of other problems caused by a changing environment.
Just months after being removed from federal "endangered" status, the region's gray wolves have been temporarily relisted, derailing state plans to hold public wolf hunts this fall.
