The mining project, one of the largest ever conceived, could hold $500 billion in gold and copper.

Gone but not forgotten, these once-bustling mining outposts offer visitors a look at Old West ghost towns, from kitschy to untouched.

Worth more than $1 million, this gemstone is distinguished for its rich color palette and light-refracting qualities that defy description.

Complimentary or not, Thomas Paino welcomes the attention being lavished on his super-efficient Long Island City rowhouse.

The Silicon Valley tech startup and the lodging platform partner to help make vacationing in a stranger's condo a more energy-efficient affair.

A new online investing platform will fund energy-efficiency improvements for churches and nonprofits in poor neighborhoods.

NASA's space shuttle Discovery is set to land in Washington, D.C. this April, where the now retired fleet leader — the world's most flown spacecraft — will

Gordon Fullerton, an Apollo-era NASA astronaut who was among the first test pilots to fly the space shuttle, died on Aug. 21.

NASA's crash dummies are worlds tougher than their car-testing cousins.

At a reservoir outside of Tokyo, water and electricity do indeed mix.

As it turns out, the Swedish retailer's rooftop power plants are also the biggest in several other states.

You might be familiar with floating wind turbines, but what about floating solar panels?

In the wake of Hurricane Maria, Puerto Rico may turn to Tesla turning disaster into an opportunity to avoid future blackouts.

British tech startup Seawater Greenhouse makes the impossible feat of growing crops in arid regions possible with the help of plenty of sunshine and saltwater.

Is responsible seafood the answer to our health and environmental crises? Author Paul Greenberg explores in a new PBS documentary, "The Fish on My Plate."

The creators of the original Flow Hive are back with a new model.

A new study suggests the UNESCO status of Canada's Wood Buffalo National Park is in danger.

Was the Gulf oil spill actually good for the region's economy? Maybe in the short-term—but the Gulf needs a long-term restoration economy, says Conservancy sc

A '60 Minutes' investigation shows that the company that owned the Deepwater Horizon rig moved its headquarters to avoid paying taxes.

What's your interpretation of this bizarre painting found on the news sharing site Reddit?

The amendment, part of a pending transportation bill, marks the Gulf Coast's 'most important conservation victory in a decade,' advocates say.

Human mothers have a relatively long gestation period compared to the rest of the animal kingdom, but a few animal mothers go even further. Here's our list of t

U.S. scores lower than many smaller and poorer countries on world motherhood rankings.

In celebration of Mother’s Day and all the lovely things our mothers have done for us — like, not eating us — here’s a rogues’ gallery of some of nat

While Mother Nature is undisputedly the center of attention this coming weekend, don't forget that there's another Mother-celebrating Sunday on the horizon ...

While Mother's Day celebrates human mothers, there are a lot of other moms in the animal kingdom worth a shout-out.

A new study buries the concept of "fat but fit," and finds that obesity is more dangerous than a lack of fitness.

There's no one-size-fits-all solution for raising HDL cholesterol levels, but it can be done — and understanding inflammation is an important step.

Loopholes in the Montreal Protocol may need to be tightened, researchers say.

It's no Jurassic Park, but a flea stuck in amber for 20 million years may still shed light on the Black Death.

The Jambato harlequin frog had been feared extinct for at least the last 30 years.

The Caribbean nation of Haiti was once lush with trees and the animals that lived there, but now only a few sections of primary forest remain.

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