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10th Planet - Jan. 2006A stunning discovery at the far reaches of our solar system raises questions about what makes a planet a planet.
Asteroid - Oct. 2006Will a doomsday rock the size of the Rose Bowl hit Earth in 2036?
Booming Sands - Jan. 2005Scientists look into a generations-old conundrum: how and why do certain sand dunes produce mysterious noises?
CERN - July 2007Beneath the Alps, the mother of all particle accelerators nears completion.
Dark Matter - June 2008Turns out most of the universe is held together by a mysterious, invisible substance.
Don't Ask the Expert: Neil deGrasse Tyson - Oct. 2005Neil deGrasse Tyson has a bone to pick with Hollywood aliens.
Hunt for Alien Earths - July 2009Astronomers may be on the brink of finding Earth-like planets beyond our solar system.
Hurricanes - Jan. 2005Predicting a hurricane's intensity is notoriously difficult, but new tools may make it easier.
Island of Stability - Oct. 2006Follow the decades-long quest to create the elusive element 114.
Lightning - Oct. 2005Experts still aren't sure what triggers it, but they suspect cosmic rays from outer space.
Moon Smasher - July 2009A NASA satellite called LCROSS heads to the moon in the hope of finding buried water.
Phoenix Mars Lander - July 2008NASA's latest robot has already found frozen water and is looking for more signs that the Red Planet could support life.
Profile: Arlie Petters - July 2007A boy from a rural village in Belize grows up to become a world-class mathematician and cosmologist.
Saving Hubble - July 2008Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.
The Search for ET - July 2008Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?
Space Elevator - Jan. 2007Can we build a 22,000-mile-high cable to transport cargo and people into space?
Space Storms - July 2008Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth.
Created July 2008
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