The U.S. tradition began in 1911, but many other cultures offer their own twist on the Mother's Day theme. Mexico's celebration in particular looks like fun.

Tennessee Valley Authority announces plans for economic development projects in Roane County, the site of last December’s coal ash spill.

In which I revisit some of my favorite posts from 2009. Watch a Malaysian mine collapse, read about a truly homemade toaster oven, and find out if kites can pow

EPAcoal.org launches a Twitter campaign to send a strong message of support to the EPA for regulating toxic coal sludge so it doesn't enter the water supply.

Despite claims that special interest groups don't have a place in the White House, some reports say that's not the case. Other reports simply don't exist.

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

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

Residents noticed 95-year-old Harvey Djerf struggling on his daily walks, so they came up with a kind solution.

It’s time to ditch the word "senior" and all the ageist baggage that goes with it.

Your body clock influences what time of day you burn more calories.

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

These half-dozen exercises will help you shed pounds if obesity is in your genes.

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

The Amazon rainforest fires have been burning for 3 weeks, and some are wondering why Brazil's crisis isn't getting more attention.

Before clean air laws were passed in Pittsburgh, smoke left buildings in a nighttime shroud all day, yet air quality issues aren't really in the past.

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

Tokyo, which cleaned up its act in the 1970s, is a role model as the Chinese capital starts to address some of the world's worst air pollution.

What good is it if all of the historical cities and natural beauty in China are covered by haze?

Skeptics question whether China can grow its economy and fight emissions. The truth is, it has no choice.

The Gogoro Smartscooter doesn't have a plug; Instead, you swap batteries at a GoStation and you are on your way.

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.

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

PVC puts out a lot of nasty stuff when it burns, and it's probably still in the soot.

Preference for "cleaner" male trees and plants in urban settings may trigger extra sneezing and wheezing. That's botanical sexism, says Thomas Ogren.

This is what London's air would look like without cars.

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

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

Falling levels of air pollution have resulted in a drop in California's dense tule fog.

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.

Re-wilding nature is always controversial, as evidenced by the conflicting views in North Carolina over the reintroduction of the red wolf.

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

This video is a good warning of the future of wildlife if populations continue to decline as Living Planet assessment reports.

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

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

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

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

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.

Zest up your holiday feast with these must-have sauces and spices.

Sign up for MNN's weekly newsletter for a chance to win a cruise on Oasis of the Seas.

Take the quiz to win 4 tickets and VIP access to one of the band's end-of-the-year shows in Atlanta.

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

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 dog food. We

There were so many adorable puppies entered in the Green Dog of the Year Contest, that we couldn't resist! Here's a gallery of 10 green puppies.

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

Fans of Mother Nature Network's Facebook page can win a box full of green, limited-edition Ball® canning jars and much more.

Six West-Coasters do a Kentucky Bourbon taste test. It gets funny.

What do you get when you merge superfoods and quality spirits? Cocktails for those who want to integrate mindfulness into all parts of their lives.

If you're forgoing alcohol this January, keep your taste buds entertained with these non-alcoholic drinks.