Dust devils on the red planet help spin off poison precipitation that makes life on the surface impossible, scientists say.

The Philippine government said an eruption was imminent and began mass evacuations after the Mayon volcano made more ominous rumblings.

Use of antibiotics in U.S. livestock may have helped create more resistant strains of the bacteria that cause the most common food-borne illness, a study shows.

Seeding Earth's atmosphere with sulfur would reflect the sun's light and heat back into space, cooling the effects of global warming, a Nobel Prize-winning chemist says.

An unusual sight livened the sunset for scientists working in one of the coldest places on Earth—a rare nacreous cloud, which form only at extremely icy temperatures.

This week: medieval psalmbook found in bog, DDT returns, giant dino found, Mideast conflict harms animals, inside Hezbollah, "half baked" lobster caught, and more.

Three—not five—major storms will develop in the Atlantic this year, say scientists at Colorado State University.

Eureka! Lost works by the ancient scholar have been recovered from a much battered medieval manuscript using x-rays from a particle accelerator.

Even bees want hot lunches. A new study shows that the insects prefer to visit warmer flowers, and plants may have evolved new features in response.

It's a safe bet that global warming is causing more heat waves, climate experts say. But it's difficult to link any specific event, such as this year's extreme temperatures, to climate change, they caution.

The widely banned pesticide could make a comeback as global health organizations endorse its use in the fight to save millions of people threatened by malaria.

A duck hunter and two wildlife workers have tested positive for a nonlethal form of avian flu, scientists say, the first sign that bird flu can be transmitted to humans by wild birds.

Scientists peering into the early universe have found an enormous collection of galaxies and gas bubbles 200 million light-years wide.

Weighing between 88 and 110 tons (80 and 100 metric tons) and 115 to 131 feet (35 to 40 meters) in length, new species was one of the largest animals ever to roam the Earth.

Weighing between 88 and 110 tons (80 and 100 metric tons) and 115 to 131 feet (35 to 40 meters) in length, the newfound species was one of the largest animals ever to roam the Earth.

Related Photos: See the Dinosaur