While leaves tumble from trees this fall, another natural wonder is soaring overhead. Hawks in North and South America are taking to the air as part of a seasonal migration.
Mount St. Helens blew a cloud of steam and gray ash into the skies over Washington State earlier today. Observers reported the eruption lasted 20 minutes.
SpaceShipOne, the first privately built, manned vehicle to reach space, roared to space and back again this morning from a launch site in California's Mojave desert.
Pick your vehicle—stock car, motorcycle, pickup truck, riding lawn mower—and competitors in the United States race them. So, too, the solar-powered car.
Earth's magnetic field has flipped many times over the last billion years. But only recently have scientists developed computer models to reveal how these reversals occur.
Tumbling through space like a fumbled football, a peanut-shaped asteroid named 4179 Toutatis is expected to pass within a million miles (1.6 million kilometers) of Earth today.
Many plants can naturally clean chemically contaminated soil and groundwater. Researchers are now helping them do a quicker, better job of rehabbing polluted sites.
Today researchers announced the discovery of a new species of ancient reptile. The 230-million-year-old remains of the long-necked, aquatic predator were found in China.
Popular television shows like CSI: Crime Scene Investigation have heightened public interest in forensics. So what is the job of a crime-scene investigator really like?
A controversial new study suggests Mars had an acidic ocean. The strange brew, spiked with sulfates and iron, could still have harbored life, scientists say.
For the past 30 years scientists have scoured the most inhospitable environments for life. Just about everywhere they look, they find it thriving in microscopic form.
Within a decade computer models may be able to forecast some types of earthquakes with accuracy similar to that of current forecasts for hurricanes, scientists say.
