Teen sets ambitious goal to be the first astronaut on Mars, and she's harnessing the power of social media to make it happen.

The Shenzhou 10, along with its three crewmembers, returned safely after 15 days of space travel.

Tuesday, Jan. 28 marked the 28th anniversary of the destruction of the space shuttle Challenger and loss of the crew.

NASA astronaut Henry "Hank" Hartsfield, who in 1984 commanded the maiden mission of the space shuttle Discovery, died on July 17

Here's how you can celebrate this April holiday honoring the first man in space.

A tiny satellite has recovered from an apparent software glitch in orbit and is on track to deploy its solar sail.

The Planetary Society's tiny LightSail spacecraft has sent a photo of its deployed solar sail down to Earth.

Breakthrough technology that separates the heat of sunlight from the light will help to improve solar cell efficiency.

Punta Gorda, a sleepy Gulf Coast getaway north of Fort Myers, shines bright as Babcock Ranch, a solar-powered eco-town, attracts its first residents.

At the 85th Annual Meeting of the United States Conference of Mayors in Miami Beach, leaders pledge to make the switch to 100% renewable energy by 2035.

The breakthrough works like a rechargeable battery that is charged by sunlight.

If you're a fan of humanely raised, sustainable beef, you may want to become a 'steakholder.'

Beef and farmed catfish aren't great on the environment, but wild-caught fish and farmed shellfish have low environmental impacts.

Ambitious, ill-prepared petroleum industry eyes the Gulf, the Arctic, the heartland.

Meet the "Saints of Somalia," a mother-daughter doctor team who have built a hospital, a school, and a peaceful community in the face of oppression and a civil

Two new studies find that hot yoga may help to reduce stress, anxiety and emotional eating.

Competitors from around the world line up on an Arctic ice floe to tackle one of the world's most difficult 26.2-mile races.

Weight lifting does more than just pump you up; it can increase your chances for survival.

Researchers looked at walkers and runners with bent and straight arms to find out.

Eating less is more important than exercise if you want to lose weight.

These half-dozen exercises will help you shed pounds if obesity is in your genes.

There are many styles of yoga to choose from, so if you’re new to yoga, it might be confusing to know the best place to start.

Before clean air laws were passed in Pittsburgh, smoke left buildings in a nighttime shroud all day, yet air quality issues aren't really in the past.

A new initiative in India will employ up to 300,000 youths in an effort to improve air quality and provide opportunities to the unemployed.

Research found no major difference in asthma rates of inner-city kids and those in other communities.

PVC puts out a lot of nasty stuff when it burns, and it's probably still in the soot.

A new study says commuting to work by car may be far more harmful to your health than previously believed.

The giant bug, Lord Howe Island stick insect, was rediscovered in the early 2000s, and now scientists have confirmed it's in fact them.

The 2014 farm bill removed some of the barriers to growing hemp. Humboldt Distillery ran with it.

Break out the whisky and the haggis for this celebration of Scotland's national poet, Robert Burns.

By analyzing ear wax from a deceased blue whale, scientists gained clues to years of chemical exposure.

When your head hits the pillow at night, do creatures lurk? See how much your know about terrifying dreams.

You say 'please' and 'thank you' and don't talk with food in your mouth, but how much do you know about minding your manners?

Different countries have different dining customs. Do you know how to avoid being offensive at the dinner table, no matter where that table is?

Lightning is more than just a stunning spectacle. Take our quiz to see how much you really know about this electrifying natural wonder.

Web site and mobile app help you find the lowest gas prices in your area.

Rich natural gas deposits off the shore of Israel can meet the country's energy needs well into the next century, provided it can be extracted economically.

Impact Energies sells and leases solar panel systems to people making less than $6 a day in Ghana. It was acquired by Persistent Energy Partners.

Ubiquitous Mardi Gras beads can be made of other things: Biodegradable seed bombs, anyone?

A singular place to say 'I do' in the Seattle area, Brightwater Treatment Plant can process 36 million gallons of wastewater daily.

Getting along with neighbors can yield big health benefits for birds, a new study finds. It's probably good for us, too.

The newly identified species weaves silky air chambers to survive high tide.

The predators burn energy 1.6 times faster than previously thought, a study finds, helping explain why the loss of sea ice hits them so hard.

New flexible glowing sheets are inexpensive, easy to recycle, and could someday replace lightbulbs and OLED technology.

Today HP unveils a breakthough in powerful computer chip technology that can process data, store memory and stack 3-dimensionally.. just like a brain synapse.

Paper that stops bullets and yarn that conducts electricity.. it sounds like Sci Fi, but Nanocomp is making these futuristic dreams a reality.

Zerofootprint's TalkingPlug device turns everyday electrical outlets into miniature communications hubs, allowing remote monitoring and control of energy use by

A light-emitting diode (LED) developed at MIT operates at 230-percent efficiency. That's not a typo. LEDs will provide 70 percent of the world's general lightin

If the Motes project is successful, it will make remote sensing as easy as using an iPhone. They are currently raising funds on Indiegogo,

Isamu Akasaki, Hiroshi Amano and Shuji Nakamura have been awarded the Nobel Prize in Physics for their invention of the blue light-emitting diode.