Scientists discovered the oldest known material on the Earth's surface while studying a meteorite that landed in Australia 50 years ago.

What caused the planets to neatly divide into terrestrial and gas giants? Scientists believe they now have the answer.

China releases a massive batch of images from its mission to the far side of the moon.

KELT-9b's star-like qualities include melting iron and smashing hydrogen molecules, meaning this is not a habitable place.

A mysterious radio signal from deep space appears to be repeating every 16 days.

Humans have detected and confirmed seismic event son another planet. Here's what you need to know about "marsquakes" and what they mean.

Using images from its Lunar Reconnaissance Orbiter spacecraft, NASA reveals the moon's 'dark side' in 4K as observed by the Apollo 13 astronauts.

The exoplanets discovered by astronomy student Michelle Kunimoto include one potentially habitable, Earth-sized world.

To find life on Mars, we may have to send probes and people into this hole.

Multi-generation living may get even more multi-generational if current demographic trends — like boomers aging — continue.

It's time to prioritize walking over driving. Cities have to change their priorities and start investing in safe transportation alternatives like walking.

A look at the demographics shows there will be a lot of baby boomers around when climate change kicks in.

We've got about a decade to fix our communities to cope with 70 million aging baby boomers. ​

This isn't an aging problem, it's a design problem.

Older people are also spending far less time socializing or reading. That's not a healthy combination.

In 'This Chair Rocks,' author Ashton Applewhite explains why everyone should be up arms about ageism.

Older people are watching more television than ever — about 4.5 hours a day — and more than any other group.

Who says you can't outrun old age?

Planet Green's web video series features 26 tasty organic treats... in alphabetical order.

New local foods website brings all of Philadelphia’s many choices together.

Executives keep a tight lid on the secret to successfully selling grocery staples to the masses.

The initiative’s sponsors are looking at Vermont’s local food program as a model.

Insects are a sustainable protein source for much of the world's poor. Soon, they may also be bread.

The White House, federal government selects communities to participate in the Local Food, Local Places initiative.

Local young people are leaving the wetlands for jobs in cities partly because the Dead Zone is eradicating the Gulf of Mexico’s shrimp supplies.

Video: Alexandra Cousteau and Expedition Blue Planet follow Colorado's dry riverbed to its historic mouth in the Upper Gulf of California.

Tour an organic farm and learn what makes it certified organic.

Video: Get green tips from Arianna Huffington and Nancy O'Dell.

Video: Get eco-tips from Tia and Wilmer. Get eco-tips from Tia Carrere and Wilmer Valderrama. (Video by Gerri Miller)

Watch Part I of Chuck's exclusive interview and take the quiz below to win tickets to the 10,000 Lakes Festival.

Watch part 2 of Chuck's interview with Widespread Panic's John Bell.

Whip up some cool Halloween costume ideas, starting with simple cardboard.

Geometric crystal ornaments bring on the color, and they're easy to make too.

Who know you could build a functional car or virtual reality goggles from cardboard?

This DIY bird feeder uses hollow citrus rinds to create a colorful cup for birds to feast on seeds.

These crafty garden markers will help you organize your plants and also make it look cute.

NREL’s new Research Support Facilities basement maze will help cut energy use by two-thirds.

Wyoming Gov. Dave Freudenthal feels that his state doesn’t need green building codes.

Banks won't touch them they are so financially risky. So why does Obama want U.S. taxpayers to fund nuclear plants when there is a 50% chance they will fail?

Solyndra's public and highly controversial bankruptcy filing is affecting other solar projects.

Solyndra's 2011 bankruptcy cast a shadow over the U.S. solar power sector, but ongoing growth in the past year may indicate it was only a partial eclipse.

Some of the nation's most recognized brands are joining the Department of Energy's Workplace Charging Challenge.

In his first week on the job, new U.S. Energy Secretary Ernest Moniz makes it clear he sees 'no ambiguity' about the scientific consensus on global warming.

The third time's a charm for the resiliency-minded contender from New Jersey.

The wild horses of the Outer Banks in North Carolina have been riding out storms for centuries.

Growing food isn't about green-thumbing our nose at Mother Nature; it's about knowing her well enough to enlist her assistance.

Pearl Fryar has no horticultural training but his talent is apparent in the 300 sculptures at Pearl Fryar Topiary Garden in Bishopville, S.C.

The International Garden Photographer of the Year honors 16 photographers for their macro images of plants and animals.

When flowers start to dry up and die, bees struggle to find nectar and pollen. Here are some signs of nectar death and what you can do to help.

A hybrid that would be cold-hardy and suitable for outdoor planting may be available for home landscapes in a few years.