Elasmotherium sibiricum, the so-called 'Siberian unicorn,' is not as closely related to modern rhinos as once thought.

Miners in Australia uncover the opal-filled fossil of a dog-size herbivore named Weewarrasaurus pobeni.

The bottom of the Pacific Ocean is actually cooling down. How is this possible? The answer is proof that Earth's systems operate on long timescales.

The space agency's $650 million Neo Surveillance Mission is designed to spot killer asteroids.

Trying to stay cool while obeying his own stringent vehicle idling restrictions, New York City Mayor Michael Bloomberg enlists security detail to install a full

Microbes possibly feeding on the remains of an ancient forest may be generating billions of tons of methane deep beneath Antarctic ice, a new study suggests.

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

Scientists have created a microbe that converts carbon dioxide into biofuel, a discovery that might boost the battle against climate change.

The environmental movement's challenges are greater than ever, but the founder of 350.org says victory lies ahead.

Scientists estimate more than 7,000 dangerous methane 'bumps' have formed in Siberia's Yamal and Gydan peninsulas over the last couple of years.

Study reveals that open-water swims have a dramatic effect on young cubs, which are forced to follow their mothers in search of food and solid ground.

The new white Coca-Cola cans are part of a fundraising campaign to protect the Arctic.

Polar bears have ruled the Arctic for 100,000 years, but now they're struggling to keep up as the region undergoes a dramatic transformation.

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

Scientists have released the first 'point of view' video filmed by a wild polar bear, offering a glimpse into the animals' daily lives.

Unlike many sangrias, this one is designed to showcase the wine, not cover it up.

As you click through these incredible photos, you'll remember just why it's worth fighting to save our oceans.

Apparently touring other people's chicken coops is what all the cool kids are doing these days.

To help erase unsightly yellowing brought on by air pollution, India's crown jewel is looking for new beauty miracles.

Decades after the first of the iconic orange phones began washing ashore, a French community finally has answers.

Yours truly will be featured on the latest edition of Climate TV talking about mountaintop mining and the future of climate activism: 'The war is just beginning

Stephen Colbert cuts through the “locavore flim flam” to find out what is at the heart of Michael Pollan’s latest book.

You can watch the live stream of the conference and follow my live tweets from the event.

This holiday season, green your home (and maybe your guests) with these five tips to boost your eco-hospitality.

Dig into MNN's recipe archives for eco-friendly and healthy food and drinks to enjoy while critiquing gowns and arguing about who should win this year's Academy

Bark beetles that are ravaging Arizona's forests can be deterred by their own 'music,' according to new research.

Dale 'Grey Beard' Sanders, 82, hiked the entire Appalachian Trail in a year.

Some trails are more attractive for solo treks because of their blend of solitude and safety.

If you're looking for ideas on where to travel this summer, this list compiled through a Yelp algorithm is a good starting point.

Here's our list of royal gardens to consider adding to your Best-of-Britain tourist itinerary.

This foliage map from SmokeyMountains.com is a handy, up-to-date guide to fall leaf season all over the country.

Markku Lahdesmaki's photo series 'Avanto' illuminates the Finnish hobby of ice swimming.

We've got picks that include documentaries, fantasy, fiction and even kid movies.

It may be a largely symbolic victory for environmentalists, but many critics of hydraulic fracturing hope it will set an example for other states to follow.

Is a bill that treats homelessness as a medical condition flawed? Or is it just what the doctor ordered?

Some of the proceeds from Lubanzi wines, which are imported South Africa, goes to help the vineyard workers and their families.

Chemists at Colorado State University think they've found a polymer that's similar to plastic and can be easily manufactured and recycled.

Why are regular citizens doing the work that should be done by the companies that make the disposables?

A community rallied to find a coyote trapped in plastic in the middle of a snowstorm.

Republicans are licking their chops about questioning the EPA administrator, but recent history shows that may be exactly what she wants.

President Obama joined CEA Chairman Austan Goolsbee at the "Winning the Future" Forum on Small Business in Cleveland.

With budget cuts come consequences. It looks like the emerging clean energy industry could take a big hit.

The USNS Henry J. Kaiser is carrying 900,000 gallons of biofuel blended with petroleum for evaluation and testing.

Billionaire philanthropist says he's 'doubling down' on efforts to reduce carbon emissions and replace half the nation's coal fleet with clean energy by 2017.

Radiators, radiant floors or hot air? It’s complicated.

Painstakingly handcrafted biopic on the legendary Dutch painter is seeking artists interested in contributing.

Whether they were based on the real thing or imagined, we welcomed these bears into our homes with abandon.

You might already know that Dory is a Pacific blue tang and Nemo is a clownfish, but how well do you know the other species that are represented in the films?

You can watch Leo DiCaprio's "Before the Flood" free online.

Used often in film productions, the lovingly preserved Canadiana Village is mostly for show.