Knowing how to measure metabolic equivalents is an easy way to sneak in exercise and make sure all your movements count.

Thomas Panek just became the first blind runner to complete the NYC Half Marathon with guide dogs.

There are many styles of yoga to choose from, so if you’re new to yoga, it might be confusing to know the best place to start.

Climatologist documents Greenland's warming conditions with a photo of sled dogs splashing in meltwater on top of sea ice.

Yes, you read that right.

A new report from the American Lung Association finds that nearly 148 million Americans breathe unhealthy air.

Chilean soccer fans are urged do the unthinkable and kindly step away from their grills due to worsening air quality levels in Santiago.

A new initiative in India will employ up to 300,000 youths in an effort to improve air quality and provide opportunities to the unemployed.

Research found no major difference in asthma rates of inner-city kids and those in other communities.

Since its release last Saturday, the film on China's crippling pollution has been viewed over 100 million times.

The soot that covers statues and buildings makes even more smog, eventually hitting our lungs.

This NASA image highlights wildfires, hurricanes and dust storms to show off the Earth's air quality.

A 'capped inversion' trapped air pollutants near the ground.

The biggest rodent to ever stalk the Earth lived about 3 million years ago — and it used its large front teeth the way today's elephants use their tusks.

Death by acid was the fate of the sea monsters that perished in Earth's biggest mass extinction, some 251 million years ago.

Seven species of Hawaiian pollinators are the first bees added to the U.S. endangered species list — but they're unlikely to be the last.

Some of these massive beasts are familiar in form but enormous in size, while others are strange hybrids of modern-day animals.

Even core areas of pika habitat 'are vulnerable to climate change within a timeframe of decades,' researchers say.

Vaderlimulus tricki is the first horseshoe crab found in Idaho rocks of the Triassic Period, and it has an uncanny resemblance to Darth Vader.

This is the first photograph ever taken of the bizarre and mysterious species, Thismia neptunis.

Researchers study the genetic secrets of the world's last Pinta Island tortoise.

If humans are still around millions or billions of years from now, they'll have to deal with supervolcanoes, asteroids and worse.

Check out the top entries from MNN's Green Dog of the Year Contest!

3 MNN Twitter fans will win a DVD of 'The End of the Line,' a documentary about overfishing that is narrated by Ted Danson.

Mother Nature Network is giving away some of our favorite green books to keep you busy by your favorite low-carbon fireplace this winter.

One of our lucky Facebook followers will have an organic backyard food garden created at their home by professionals.

Become a Pinterest fan, repin from our back-to-school board and you could win an iPad and green books.

Become a Facebook fan and win these 7 environmentally-themed titles.

For the holiday weekend, and all summer long, try this easy trick for making a lot of large ice balls at one time.

If you’re gluten-free or just avoiding the dreaded beer belly, consider trying these lighter, lesser-known alternatives to beer instead.

Open up the liquor cabinet, pull out your shaker, and celebrate your hard work with a cocktail.

This simple lime-cutting hack gives you more juice and has the added benefit of less cleanup when you're done.

Session cocktails and plant-based barbecue are the biggest food trends this summer.

Mercury is not just hellishly hot but apparently covered in brimstone. A vast part of the planet is covered with dried lava – enough to bury the state of Tex

The oddball asteroid Lutetia is a rocky remnant of the material that formed Earth, Venus and Mercury about 4.5 billion years ago, a new study suggests.

An impact basin spotted on Mercury with two smaller craters above it looks remarkably like the sweet treat-loving Cookie Monster muppet of "Sesame Street" fame.

This is a great week for planetary observers. Mercury is in its best position as a "morning star" for observers in the Northern Hemisphere while Jupiter is at i

The discovery of huge amounts of water ice and possible organic compounds on the heat-blasted planet Mercury suggests that the raw materials necessary for life

Spliced from thousands of screenshots of the planets, NASA has created a new video of Mercury that shows off the planet's diversity in terrain.

A video from a NASA spacecraft studying the sun has captured an unexpected sight.

By analyzing ear wax from a deceased blue whale, scientists gained clues to years of chemical exposure.

Mercury, the smallest planet in our solar system, may hold clues to understanding how the Earth's moon was born.

This week in the hour before sunrise early morning stargazers will get a double treat: the planet Mercury and two special comets.

For the next few weeks, about half an hour before sunrise, Mercury will peek over the southeastern horizon for observers in the northern hemisphere.

The surface of Mercury is shrinking faster than previously thought, photos from a NASA spacecraft orbiting the tiny planet reveal.

An analysis of dozens of pyroclastic ash deposits suggests that Mercury had an long history explosive volcanism.

A NASA spacecraft slammed into the surface of Mercury on Thursday, April 30, bringing a groundbreaking mission to a dramatic end.

Mercury, named for the Roman messenger of the gods, is the smallest planet in our solar system and the closest to the sun. Check out these amazing images

This devilishly difficult quiz will separate the auto experts from the pretenders.

Sometimes scientists infuse some pop culture into their species names. Can you match the celeb to the critter?