More than 7,000 cities in 172 countries are expected to take part in the one-hour event on Saturday.

An international design competition hopes to bring energy-efficient housing and more to Tristan da Cunha.

With California-based OhmConnect, it's easy being green when you're also earning green.

Spanish endurance athlete Antonio de la Rosa is the first to cross the Pacific on a paddleboard.

Six months after leaning they were or were not going to be getting one of NASA's retired space shuttles for display, museums in Los Angeles, Houston and New Yor

The first 'A' in NASA's acronym name — Aeronautics — will play a leading role in the final flights of its recently retired shuttle program. Space agency jet

The Enterprise and Endeavour both have temporary displays, but their museums need help to make plans for permanent homes a reality.

Former astronaut Alan "Dex" Poindexter, 50, a space shuttle commander who flew twice into space, died on July 1 after being injured in a water sports accident i

NASA deployed a few high-flying paparazzi to Hollywood to scout out the best photo spots for next month's arrival of one of its biggest stars: space shuttle End

As the space shuttle Endeavor is poised to come to Los Angeles, crews will remove about 400 trees to make room for its passage.

Space shuttle Endeavour's trip to California has been delayed by a weather front in its way.

The space shuttle Endeavour takes to the skies above California for its last-ever flight today, Sept. 21, giving observers from Sacramento to Los Angeles a one

Space shuttle Endeavour, now a permanent resident of the state of California, has traded its winged chariot for a set of custom wheels.

Space shuttle Endeavour has hit the road in Los Angeles to start its two-day journey to its new home.

Amidst much fanfare, the new museum display featuring retired space shuttle Endeavour opened to the media and invited guests here on Oct. 30.

This week marks a somber time for NASA, with the anniversaries of three U.S. spaceflight disasters.

Since the end of its space shuttle program, NASA is relying more and more on commercial space travel.

NASA astronaut Steven Nagel, who flew four space shuttle missions, died Thursday, Aug. 21. He was 67.

A spacecraft launch in Kazakhstan turned into a scary situation as a booster malfunctioned mid-launch, sending the space crew into ballistic decent.

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.

California approved new rules that require new homes and low-rise apartment buildings to use solar panels starting in 2020.

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

The Brock Environmental Center's 'regenerative' design is key to its AIA recognition — it generates 80 percent more energy than it uses.

Go ahead and drink wine from a can this summer, but remember: It's not fine wine; it's fun wine.

In the 2 years since the U.K. imposed a 5-pence fee, about a third of shoppers still use plastic bags. What price would change your habits?

As Harvey's floodwaters recede in Houston, Red Hook in Brooklyn, braces for the next big storm.

Cork advocates make a good argument to use the traditional wine closure.

Swale, a barge repurposed into a 'floating food forest,' lets people pick and eat produce for free.

Flahavan's Irish Oats courts millennials with stories and unconventional recipes.

President Obama has a tricky balancing act to perform as BP plans to resume offshore drilling in the Gulf of Mexico.

Planet Green to premiere new documentary about the impact on Gulf residents of the largest oil spill in American history.

Researchers have developed a soap made of iron rich salts which could one day safely clean tainted water.

The oil giant has pleaded guilty to 12 felony counts and will pay a record $4.5 billion fine. Three of its employees have also been charged with manslaughter.

Mother's Day gifts. Psst ... Mother's Day is just around the corner. Honor your Mom with a gift that both she and the planet will love.

Mother's Day crafts. They are so easy to do, there's really no excuse not to melt Mom's heart.

Mother's Day gifts that fill up mom's heart, not her trash can.

Our food blogger recommends books she loves as gifts for the mom you love.

Forget the fancy flowers and jewels. These sweet, simple gifts are the way to mom's heart this Mother's Day.

What does your mom really want for Mother's Day? (Hint: You won't find it at the store.)

Don't forget grandma this Mother's Day. The older women in your family have lots to share if you take the time to listen.

In honor of all the hard-working mothers in the animal kingdom, here's a collection of adorable baby animals being doted on by their moms.

Think sustainable pink for mom this Mother’s Day when you’re planning your celebrations.

So that you don't wind up gifting an awesome mum something too sentimental and/or last minute, a few singular Mother's Day gift picks ...

Put down those flowers and jewelry. Here's what mom really wants this Mother's Day.

Mother's Day may be the perfect time for Duchess and Buttercup to find a family.

Engineer Henry Liu is honored for inventing a way to transform toxic waste into environmentally friendly bricks used for construction.

EPAcoal.org launches a Twitter campaign to send a strong message of support to the EPA for regulating toxic coal sludge so it doesn't enter the water supply.

An expert conditioning coach offers down-and-dirty advice on preparing your body for an obstacle race.

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

If you want to try a triathlon, here's what you need to know about the event that combines swimming, cycling and running. Experts Erin Beresini weighs in.