While the average number of twisters has held steady for more than 50 years, the US tornado season appears to have taken on a 'boom or bust' pattern of extremes.
Washington wildlife officials say they've had to trap seven bears that became a dangerous nuisance in her neighborhood.
A mountain-sized comet will pass mind-bogglingly close to Mars on Sunday, approaching within 87,000 miles at a speed of 126,000 mph.
Scientists say the wobble in Saturn's smallest moon could point to an inner sea sloshing within.
NASA's New Horizons space probe is set to zoom by Pluto next summer. Where should it go after that?
Images of water ice snapped by a Mercury-orbiting NASA probe suggests that ice lurking in the otherwise-scorching planet's frigid craters may have arrived there recently.
The enormous ancestors of modern kangaroos may have preferred walking to hopping, new research indicates.
Riding atop the Rosetta spacecraft as it orbits Comet 67P/Churyumov-Gerasimenko, the European Space Agency's Philae lander has snapped a photo of itself, with the comet in the background.
Researchers have discovered methane-eating microbes inside towering rocks at the bottom of the ocean.
A duo of NASA astronauts are performing a spacewalk outside the International Space Station. Here's how to watch it live online.
The first MAVEN images are much clearer than expected, giving scientists their first look at the structure of Mars' extended upper atmosphere and clues to its history.
Stephen Hawking is the subject of "The Theory of Everything," which takes audiences into the personal challenges faced by the renowned astrophysicist.
After 22 months in orbit, the mysterious X-37B is set to return to Vandenberg Air Force Base in California.
In what they are calling a very rare discovery, archaeologists in Leicestershire, England, have discovered the bronze remains of a burnt and buried chariot.
Archaeologists in Tel Burna, Israel, have discovered a 3,300-year-old complex for devotees to what was possibly an ancient storm god, or perhaps a female goddess of war.
European Space Agency's Rosetta spacecraft has sent home images of a large pyramid-shaped boulder on Comet 67P/Churyumov-Gerasimenko.
Archaeologist say they have discovered an intricate mosaic from the time of Alexander the Great.
A decades-long quest to save the north Atlantic right whale is helping revive a species that is a bellwether of the health of the oceans.
Inspired by sidewinder snakes, a team of researchers have designed a robot that can slide across the sand, for potential use in search-and-rescue missions.
Astronomers have created a detailed 'weather map' of WASP-43b, a 'hot Jupiter' some 260 light-years from Earth with supersonic winds and temperatures that would melt steel.