Scientists have known this for a while now, but new research gives us more information about why kangaroos are so much more efficient than cows.

Potters Fields in England is a perfect example of how to use design elements to make the landscape shine in the colder months.

Site for wind farms is not exactly the type of field you picture a retired NFL linebacker scouting. But Sean Tufts is not your typical retired player. Nor is he

Physicist Kenneth Libbrecht, a leading expert on snowflake formation, is proud to have added scientific accuracy to Disney's hit animated musical.

Measles can weaken the immune system for years afterward.

The way snow dances around wind turbines is shedding light on the mysteries of how air turbulence behaves.

The PACT Act makes animal cruelty a federal felony, threatening violators with fines and prison time.

Jaguars used to roam all over the Southwest but now are an extreme rarity. And this unique cat is already threatened by the mining industry.

It would take an extraordinary force of nature to blow one of these straw-stuffed brick abodes down.

Our houses are way more efficient than they used to be, but we're using more energy per capita than we ever have.

If it isn't covered in toxic foam, Bellandur Lake in Bangalore is catching fire. The residents have complained

Summer solstice, the unofficial first day of summer, is the day with the most hours of daylight.

At the 85th Annual Meeting of the United States Conference of Mayors in Miami Beach, leaders pledge to make the switch to 100% renewable energy by 2035.

Apple suppliers have committed to clean up their act as well.

T. Boone Pickens, the founder of BP Capital Management, joins the Morning Joe gang to discuss the town hall meetings he's been holding across the country on the

Three years after the worst environmental disaster in U.S. history, here's a look at how various victims of the Deepwater Horizon oil spill are recuperating.

If you’ve ever had a mom, been a mom, or known a mom, you’ll relate to this hysterical video by Anita Renfroe.

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

The Caribbean nation of Haiti was once lush with trees and the animals that lived there, but now only a few sections of primary forest remain.

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

Test your knowledge of the wild world of animal mating.

From what they eat to wear they live, test your giant panda knowledge with this quiz.

Whether you watch them at your backyard bird feeder or just see them when you're hiking, how much do you really know about our feathered friends?

What do you know about your kidneys? They don't get the acclaim of the brain or the heart, but these small organs work nonstop to keep your body healthy.

Let's see how well you know your own species' family tree.

Test your knowledge about frogs and toads with this quiz.

You go to the beach to relax and soak up the sun. But how much do you really know about the waves and the sand?

How much do you know about these ancient shelled reptiles?

Before you scoop up your next bowl of ice cream, test your knowledge about everyone's favorite summer treat.

Due to history or legend, most countries are known for contributing something specific to the world. How many do you know?

They help you see the world, but how much do you really know about the windows to your soul? Test your knowledge.

Can you live without your morning coffee or afternoon soda? See how savvy you are about your daily buzz.

When your head hits the pillow at night, do creatures lurk? See how much your know about terrifying dreams.

There's a whole medicine chest in the garden. Do you know which plants to use for what ailments? Test your holistic herb wits here.

How much do you really know about the ground under your feet? Test your knowledge with this quiz.

How well-versed are you with our planet's fascinating geology? Test your knowledge and find out.

If you find yourself glued to the TV when the Academy Awards roll around each year, this quiz might be your chance to shine.

These iconic pink birds are immediately recognizable, but how much do you know about them? Test your knowledge of these beautiful birds!

Life across the globe depends on bees, butterflies, birds, bats and other pollinators. Test your knowledge about these vital creatures.

From spring showers to summer thunderstorms, rain can fall any time of year. But how does it work?

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?

The online dictionary Dictionary.com added a number of popular words culled from headlines and social media. Can you define them?

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

We use calendars to keep track of our days, our weeks and our years. But how much do we really know about them?

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.