Experts: Western wildfires are becoming more immense and explosive than in the past
Spindly all-solar plane's green tech exploration: Getting a thrill while saving the planet
Obama climate change plan faces political, practical challenges amid industry criticism
US researchers say 2 men with bone marrow transplant stop HIV drugs, show no sign of virus
Chicago's Field Museum defends its renowned research reputation amid budget cutbacks
Peru officials say developers destroyed pyramid at 4,000-year-old archaeological site
Russian booster rocket carrying 3 satellites crashes seconds after launch in Kazakhstan
Jason-1 ocean-mapping satellite is decommissioned after 11½-year mission
Princeton researchers use 3-D printer to combine tissue with electronics, create 'bionic ear'
A New Mexico town recently saw a hail of a lot of precipitation.
The low-down on the West's heat wave: what's causing it and why hot nights are so dangerous
In the annual report card from the Center, the health of the bay has improved, going from a D+ rating in 2011 to a C for 2012.
Fallen firefighter Eric Marsh founded, tried to protect Prescott Hotshots
Italian Margherita Hack, who studied the stars and led civil rights battles, dies at 91
New NASA satellite to embark on sun-watching mission after launching from coastal California
Should giant sequoias be watered? Scientists ponder impacts of climate change across Sierra
2013: Space odyssey? PayPal looks to explore how payments will work in space
NASA: Voyager 1 spacecraft enters unfamiliar space but has not yet exited the solar system
Space shuttle Atlantis 'go' for public viewing, last of NASA ships to fly and open for display
New species, a gray Cambodian tailorbird, discovered in lowland scrubs in nation's capital