Dry, cool air mixed with warm moisture, add in heat, and deadly tornado outbreak is cooked up
TVA: Watts Bar nuclear plant set for completion in December 2015, systems ready for testing
D.C. is credited with being one of the greenest cities, one of the healthiest cities and one of the wealthiest cities. But it's also one of the most polluted cities.
Countries prepare to debate destroying last smallpox stocks; US officials say still too soon
Unique floating lab decodes gene blueprint of 'aliens of the sea,' seeks clues on regeneration
Authorities investigate whether small boat found on Washington beach is tsunami debris
Recently arrived mosquito-borne chikungunya virus spreads widely in Dominican Republic
GO FIGURE: Storm dumps 17 inches of rain on Pensacola, more than Los Angeles got in 2 years
Utah man charged in theft of priceless dinosaur footprint pleads not guilty
With cloning technique, scientists create insulin-making cells bearing DNA of diabetic woman
Antarctic prime spot for Tuesday's solar eclipse, ring of fire will grace southernmost skies
3 businesses cleared to reopen as Wyoming landslide movement slows significantly
Federal government spent $236 million to help landowners preserve sage grouse habitat
New research shows speed reading apps limit the body's ability to backtrack, an eye movement crucial to reading comprehension.
South Carolina lab asked to review vapor problem at Hanford Nuclear Reservation in Washington
Film review: Only Andrew Garfield-Emma Stone chemistry keeps overstuffed Spidey sequel alive
Get your bids ready -- the Friends of the National Zoo is auctioning off the chance to tour the panda house and get up close and personal with Bao Bao and her family.
Yurok Tribe signs agreements to release 1st captive-bred condors to California's Redwood Coast
Experiment to settle whether wild steelhead are really better biters than hatchery steelhead
After rescuing an orphaned bear cub, an animal rehabilitation center in Lake Tahoe is sharing the critter's progress in unbearably sweet videos and photos.
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