See if you know the difference between a bedbug, a beetle and these other creepy-crawlies.

Bison have been named our new national mammal. Test your knowledge of this species that's so critical to North America's ecology.

These unusual creatures are stunningly beautiful and surprisingly important to life on Earth. Show us what you know!

Step aside, retrievers and beagles, and let these rare dogs trot into the spotlight. From Pulis to Leonbergers, how much do you know about these breeds?

Sheep provide us with meat, clothing and even scientific illumination, but how much do you know about them? Find out with this quiz.

Nobel by the numbers: How much do you know about the history of the Nobel Prize? Take the quiz.

Test your knowledge of all things autumnal.

Bacteria live everywhere in your body, including your gut. These microbes have quite an impact on your health. Do you know what they do?

Whether it's a white lie or a whopper, fibs are part of our daily lives. We like to think we're honest but, well, we're not. Test your falsehood expertise.

The Earth's mountains, rivers, animals and rocks have been around for millions or billions of years. Do you know which ones have been around the longest?

Dogs have incredible senses and are like superheroes on four legs. Take this quiz to test your canine know-how.

Whether you're crying tears of joy or crying over spilled milk, how much do you really know about the tears rolling down your face?

Lightning is more than just a stunning spectacle. Take our quiz to see how much you really know about this electrifying natural wonder.

Think you know everything about that special day of scary movies and sugar highs? Test your Halloween smarts ... if you dare.

It's time for some healthy change. Here are some fundamental truths you need to know about diet, exercise and other wellness goals.

Sure herbs and spices taste wonderful, but do you know what benefits they provide to your body?

When the going gets tough, some animals get going — to bed. Take our hibernation quiz to see how much you know.

Venture capitalists, energy researchers and policy makers gather for first time in New Mexico.

Pickens: 'If you don't think that you're gonna see a $200 barrel of oil, you're joking.'

Matt C. Rogers, senior DOE advisor talks about awarding stimulus money for top energy projects.

Former Carter advisor and energy guru S. David Freeman will become the 'environmental mayor' of L.A.

The Sustainable Energy Coalition lists 7 facts about the growing green jobs sector.

Hearth and Home Technologies says 100 million homes can be heated sustainably with wood pellets.

New website pulls together a wealth of information on renewable energy and tracks green stimulus spending.

Climate activists call for action to strengthen the most important piece of environmental legislation in history.

When the Winter Olympics wrap up, Vancouver will be passing more than one torch. The city could light the way for green cities of the future by proving economic

The vision of an energy-efficient super grid that allows powers companies to communicate real-time may be possible through Google-Spectrum Bridge partnership.

A study from the Civil Society Institute reveals that party lines divide many people's feelings about global warming, energy independence and green jobs. Here a

Web site and mobile app help you find the lowest gas prices in your area.

In the 10 years since Osama bin Laden became a household name, we have fought a war on terror, watched oil prices skyrocket and continued to get oil from the sa

The 57,000-acre San Andres Refuge, which works to restore desert bighorn sheep, launched its quest for energy independence in 2005 and has implemented several s

Renewable energy is a powerful force for the decentralization of Big Energy (and Big Government). It's odd that it isn't more popular in supposedly 'radical' an

Las Vegas hosts a clean energy summit, and politicians pledge allegiance to green cars, photovoltaic arrays, geothermal and wind turbines.

Rich natural gas deposits off the shore of Israel can meet the country's energy needs well into the next century, provided it can be extracted economically.

Japan's plan to wean off nuclear power could help lead a global push toward cleaner, more efficient civilization, says U.S. energy guru Amory Lovins.

If fracking techniques pollute water supplies, what will happen to beer production?

Famed architect Renzo Piano completes a self-sustaining micro-home named Diogene.

Toyota, Nissan, Honda and Mitsubishi are working together to dramatically expand the number of public chargers available in Japan.

Impact Energies sells and leases solar panel systems to people making less than $6 a day in Ghana. It was acquired by Persistent Energy Partners.

El Hierro, the smallest of the Canary Islands, is becoming energy self-sufficient by relying solely on wind turbines and hydroelectricity.

MNN introduces you to the key characters in the Eco-bama drama including Steven Chu, Carol Browner and more.

Mayor Sadiq Kahn wants Londoners to stay hydrated with public water fountains while generating less plastic waste.

The Museum of London will showcase part of a 143-ton chunk of fat, diapers and baby wipes that was removed from the city's sewers.

As far as creative ideas to keep food food from being wasted go, Toast Beer is pretty brilliant.

Sweden is to thank (go figure) for a hot new lifestyle trend known as plogging that encourages participants to beautify cities while burning calories.

Ubiquitous Mardi Gras beads can be made of other things: Biodegradable seed bombs, anyone?

Organic supermarket chain EkoPlaza teams with an anti-plastic waste group to launch a supermarket aisle liberated from plastic packaging.

The specialized DNA of cockroaches makes them dumpster divers extraordinaire.

A study found that while plastic bag litter has decreased in the U.K. seabed, other forms of pollution have increased.

While easy to focus on the gross-out factor, the tale of a stranded train filled with sewage sludge shines a light on the complicated afterlife of our waste.