Wildlife officers had to ask firefighters to help them get a black bear out of a tree in Steamboat Springs after a tranquilizer shot couldn't get it to budge.

Global warming is rescuing the once-rare brown Argus butterfly, scientists say.

Recycle old newspapers and paper scraps to create pretty handmade paper for unique and personal wedding invites.

Two cheetah cubs have a new home at the Smithsonian's National Zoo and are being raised by human hands after a risky birth last month at the Smithsonian

Two cheetah cubs have been transported to the National Zoo to be raised by hand.

Check out these incredible images of the sun's surface. NASA released this enhanced video to show the sun's intense activity a different light.

Deer can swim, but not very far. When they showed up for the first time on the Big Island of Hawaii, mystified residents wondered how they got there.

The Clean Ocean Action environmental group will cover the New Jersey and New York shoreline this summer in an organizing campaign to build support for federal

A group of California grade school students wants Crayola to start a recycling program for spent plastic markers, but the company doesn't appear ready to make

Ford is taking on Toyota in the hybrid market.

The idled San Onofre nuclear power plant is facing new scrutiny from Congress as the utility that operates it moves closer to proposing a fix to get the twin

The director of the National Renewal Energy Laboratory says the world needs to phase out scaled-up investments in natural-gas fired power plants to blunt

With all the restrictions in proposed state regulations and local bans, gas companies say about half of their lease holdings in the lucrative Marcellus Shale

The U.S. Navy may hurt more dolphins and whales by using sonar and explosives in Hawaii and California under a more thorough analysis that reflects new

Federal officials are considering whether the eastern diamondback rattlesnake should be given endangered species protection.