As the 'Mad Pooper' terrorizes Colorado Springs, many are asking why runners are so obsessed with poop anyhow.

Rhabdomyolysis is rare, but if your workouts cause extreme soreness or swelling, check with your doctor.

Schools are phasing out dodgeball and other sports in favor of exercises that get kids moving for a lifetime.

Competitors from around the world line up on an Arctic ice floe to tackle one of the world's most difficult 26.2-mile races.

Here's the secret to getting that smell out of your high-tech exercise wear.

New study finds several short bursts of exercise are just as effective as one long one.

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

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.

Your social network predicts your health and wellness more than your fitness tracker, study finds.

New study finds that air pollution limits led to 10 percent more rainfall for Atlanta in the 1970s and 1980s.

Air pollution may be responsible for more than 2 million deaths around the world each year.

Tree rings of old eastern red cedars show improved tree growth and physiology since the Clean Air Act's implementation in the 1980s.

Outdoor air pollution has now been classified as 'carcinogenic to humans' by the United Nations.

Can a vacuum suck up China's smog? Daan Roosegaarde will test his new technology soon in Beijing's parks.

Air pollution exposure contributes to one in eight deaths around the globe, according to WHO estimates.

While it ranks high on the gross scale, peeing in a pool has never been considered hazardous. A study, however, uncovers health effects.

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

By adding tiny nanoparticles of titanium dioxide, our clothes could become air purifiers — or so they say.

Dozens of cities throughout the country have either banned or limited fireworks displays due to the threat of heavy pollution.

The WELL standard picks up where LEED and other standards fear to tread.

Prime Minister Modi's efforts aimed at tackling local air pollution, but the whole world stands to benefit.

Air pollutants are linked with heart disease, lung disease and other serious afflictions that have long-term impacts.

Paris gives cars the boot on this popular thoroughfare one day a month to promote clean air and exploring the city on foot.

It's a breakthrough that scientists around the world have been pursuing for years.

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

The air inside your home can be more polluted than the air outside. Want cleaner air? Here are 11 natural ways to clean your indoor air without using chemicals.

Five of the best 7 months for Beijing air quality have occurred since last summer.

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

A new study suggests that dark matter from the galactic plane may have been what really killed the dinosaurs — and it may one day threaten us.

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

Sudan and two females of his subspecies are under constant surveillance in Kenya, but it may not be enough to save the northern white rhino from extinction.

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

Seeds found during an archaeological dig on First Nations land revive a long-lost varietal.

Just like 'Jurassic Park,' except with flowers instead of dinosaurs.

The discovery offers new insights about dinosaur plumage, hinting at a 'chestnut brown' creature that couldn't fly.

At least five similar die-offs have happened before, but this is the first in human history — and the first with human help.

Ancient 5-foot 7 penguin weighed at least 220 pounds and speared fish with its sizable beak.

The crest-tailed mulgara was once a common sight in New South Wales deserts before other predators edged it out of the habitat.

The U.S. Fish and Wildlife Service declared the eastern cougar extinct after it not being seen for over 80 years.

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.

Researchers discovered a Chelonoidis phantasticus giant tortoise on Fernandina Island. The last time this tortoise was seen was 1906.

Researchers extract nuclei from a preserved woolly mammoth carcass, implant them into the egg cells of mice, and watch as the bits became animated.

Humans have driven almost 600 plant species extinct since 1750s and that number is likely much higher.

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MNN and Eukanuba are looking for the Green Dog of the Year. Enter your dog for a chance to win a year's supply of Eukanuba Naturally Wild Formula dog food.

NN and Eukanuba are looking for the Green Dog of the Year. Enter your dog for a chance to win a year's supply of Eukanuba Naturally Wild Formula d