NASA astronauts make history with an all-female spacewalk — now that the spacesuit problem is resolved.

From nearsightedness to bone mass, a trip to the International Space System has a notable effect on astronauts' bodies.

Arctic sea ice, the white cap that covers the watery northern edge of the planet, has melted back to a record low level.

The U.S. energy sector is 'in the midst of a transformation,' according to a new report, thanks to the growing use of natural gas and renewable power sources.

Toyota has donated 4,500 free trees for this March's giveaway for New York City residents.

This much CO2 hasn't filled the planet's atmosphere since the Pliocene Epoch 3 million years ago — long before modern humans existed.

After scrutinizing thousands of peer-reviewed climate studies, the largest analysis of its kind reveals a 'gaping chasm' between science and public perception.

This surprising discovery won't be enough to stop climate change, but it will help, researchers say.

The worldwide ban on ozone-depleting chemicals stopped Arctic ozone from disappearing and forming an "ozone hole" similar in size to Antarctica's.

Just in time for a new U.S. report on climate change, a stunning animation shows how much we've already altered Earth's air.

The risk of 'severe, pervasive and irreversible impacts' is quickly rising worldwide, the draft report warns.

Scientists with NASA unveiled the first carbon maps obtained by the spacecraft, named the Orbiting Carbon Observatory-2, or OCO-2.

Even though Earth is already in an ice age, a surplus of ice is the least of our worries.

The latest World Meteorological Organization Greenhouse Gas Bulletin paints a grim picture for our environment.

Newly declassified photos show a shocking loss of ice in the Arctic as global temperatures continue to rise.

Four years in the making, the Discovery Channel/BBC co-production is a groundbreaking look at the Earth's polar regions.

Long-term thinning of Arctic sea ice combined with an intense, windy storm over the Arctic in early August contributed to a new record low for sea-ice extent, s

In continued efforts to track changes in glacial and sea ice, NASA's IceBridge plane has begun collecting data in Greenland.

A new visualization from NASA offers a unique view of life on Earth.

Cadbury will certify 300 million of its Cadbury Dairy Milk chocolate bars as well as its packaged cocoa, at a cost of £1.5m ($2.1m), by the end of summer.

The narrowest building in Poland is the work of Israeli writer Edgar Keret.

Feeling a little full of yourself? Check out these 19 boys and girls who actually did something about the world's ills before they even got to their 20s.

Could we be witnessing Korean pop's plunge into the cultural criticism arena?

It's time to cultivate a true appreciation for what we have.

Organize your home and office with help from Gail Blanke's book about clearing the clutter.

These athletes got to the top of their sports without meat.

Anas Cheema, a 22-year-old economics student at the University of Victoria, decided to dedicate his summer.

Research conducted in Madison, Wisconsin, finds soil in developed residential landscapes is better at absorbing CO2 than forests.

The whole point of getting out into the natural world is to see, smell and hear the sounds of nature.

500 square miles of Appalachian forest is gone forever due to illegal mountaintop mining, and the EPA doesn't seem to mind.

A new YouTube integrated map lets Appalachian communities speak out on mountaintop coal mining.

Rainforest Action Network decides enough is enough with Obama's broken promises on mountaintop mining and stages dramatic protest in front of the EPA.

Do they really blast the tops off of mountains to get at cheaper coal? Do they really kill whales and dolphins and call it "research". Sarah Palin on the Discov

New EPA ruling on infilling valleys may limit future mountaintop mining permits, but it's only the first step in a long process to stop the 'Appalachian Apocaly

A state legislator has an interesting and potentially viable way to avoid dealing with the EPA.

Even if you're not tapped into the daily vibe of environmental news and issues, you've not doubt probably heard of or seen the devastation caused by mountaintop

The Washington, D.C., river epitomizes the ecological dangers that plague many U.S waterways, according to a national environmental group.

After months of careful consideration, actress says her 'responsibilities and energy' need to be focused on family.

A young parkgoer returned a rock she took from Smoky Mountains National Park along with a drawing and a nice letter.

Communications Wireless Group works with business owners to recycle, refurbish, and reuse old wireless devices while maintaining a zero-landfill policy.

Sprint customers can get instant credit on their phone bills by recycling old phones at local stores.

Phone recycling has become so easy, convenient and, in some instances, profitable, there’s really no reason not to do it.

Are you a homeowner interested in top-of-the-line green technology but not the uber-modern aesthetic that often accompanies it?

Cheap solar panels, micro-inverters, and plug-in technology make DIY solar a reality for the first time.

The O'Neill Passive House, America's first passive house retrofit project, requires as much energy to operate as a standard hair dryer.

Unity College students settle into TerraHaus, the sustainability-focused Maine institution's new residence hall that's built to stringent, super-efficient Passi

On Hamburg's waterfront, world-class sustainable architecture has emerged not from lofty green goals but from practical questions like this one: How do you buil

Passive solar is pretty simple. The solar part is obvious: It refers to the sun. The passive part means it works without any mechanical devices, added energy in

The president is getting a report card for his first 100 days in office from Michael Pollan and others. How's he doing on the food front?

Monsanto, swine flu, Lay's claim to be local, Michelle Obama's organic garden, school lunch programs and more. This video has Michael Pollan weighing in on a lo