Our photo of the day illustrates why the word 'caterpillar' (literally, shaggy cat) makes perfect sense.

These impressive feats of architecture and engineering are one of India's traditional methods of water conservation. Now threatened by disuse and a growing water crisis, one photojournalist is documenting them before they are forgotten.

What can you do with 1.285 bright green used uniforms? This was the brief the design students at Elisava school in Barcelona received by Urbaser, a local waste collection and urban

Here is one woman's version of simple living on the river, in a boat that is equipped to see the tough northern winters through.

More and more, urban biking has become one of the best ways to see a lot of a city in a short span of time, so it's a no-brainer that more hotels are offering free bikes along with the price of the room. In

The new dragon's breath chili is killer hot, but is intended to help, not hurt, when used in medical treatments.

If you can’t decide between a fruit smoothie or an iced tea, this is the drink for you.

From its tiny source to the Houses of Parliament, here are glorious photos of the River Thames.

Our photo of the day pays homage to the first designated Canadian Heritage River.

This competition for the best environmental photography never fails to be interesting and professional.

This could be why so many people ignore global warming.

Our photo of the day reveals a butterfly of most beautiful contradictions.

Our well-coiffed photo of the day comes from the rain forest of Ecuador.

Photographer Michael Ciaglo has shared his haunting photos from Agbogbloshie, the "digital dump" on the outskirts of Accra, Ghana.

Can hotels be 100% eco-friendly and affordable? I tried out Starwood's Element Hotel in NYC to find out how far a 411-room urban hotel can go green. The result is mostly positive with a few letdowns.

An architectural tradition dating to the 9th century, Iceland's turf houses are an enduring inspiration.

A tropical skyscraper by WOHA and Patricia Urquiola is wrapped in a vine-covered sunscreen.

A fading fairytale village will become Switzerland's first 'scattered hotel' thanks to a foundation committed to saving it.

Argentine architect Carlos Levinton, who we've seen help Bolivian communities with PET, was asked by the UN White Helmets Comission to collaborate with ideas for the reconstruction of Haiti after the earthquake.

Number of storms predicted per year during the period 1854 -- 2006 versus numbers actually observed for the Atlantic (filled diamonds). The model predictions (grey curve) have been normalized to the data. A quadratic fit to the model is shown for

If you'd like a close-up view of the BMW i8 electric sports car manufacturing process, here are the goods.

Evonik and Siemens announce two-year project to demonstrate feasibility of "technical photosynthesis" using eco-electricity to convert carbon dioxide into valuable chemicals

The story combines the beauty of nature, wanderlust, and the deep love that can exist between human and dog.

Last night, on her show, Rachel Maddow showed some incredible photos of an explosive accident at a Texas fracking site. After seeing the photos, you'll be surprised to learn that thankfully no one was killed.

Another signs that the poles are warming fast.

Plus a bounty of facts about these freewheeling islands of ice.

The Greenpeace ship Arctic Sunrise is on a 3-month Antarctic expedition, supporting an international proposal for the world’s largest protected area.

Doubletree Hotels with the Arbor Day Foundation kicked

This fascinating installation where algae, bioluminescent bacteria, humans and smartphones interact may chart where a new generation of urban "cyber-gardeners" may go.

Our photo of the day reminds us of the importance of sea otters.

Take one of the world's most beautiful places, add dappled sunlight, and voila.

These are for those nights when cooking feels impossible, but has to be done...

This looks like lungs, sort of, but it's really made out of meadow flowers.

I'll admit it, I'm a sucker for those little hotel soaps and shampoos and lotions. I rarely go home from a hotel stay without a handful of them stuffed in my bag. But they are

Deserts are hot, dry, and unforgiving -- which makes them difficult environments for most creatures to survive in. But desert residents who have adapted to the temperatures -- by learning to survive without water, developing their own cooling systems, and

Cooling a data center in one of the hottest parts of the USA can be done by using hot water, as eBay's Phoenix facility finds.

A drive-in movie theater in the wilderness and an urban rooftop are just a few of the innovative spots from which stylish trailer hotels are popping up.

It took me hours, but I finally found this guy.

Check out these photos of a surprise 10-mile lake that popped up in Death Valley, California.

Our photo of the day comes from the Essex countryside.

Our photo of the day comes from Atascadero, California.

Our photo of the day shows how to make an awkward bill look like a thing of grace.

Our photo of the day reveals the wonderful frippery of waterfowl.

Our photo of the day features one of the smallest of North American owls.

Our photo of the day comes from the Lower Rio Grande Valley in Texas.

Our photo of the day is a lesson in singing and building.

Some birds are charming, others majestic or graceful; the subject for our daily photo has it all.

Our photo of the day comes from above the Pacific Ocean.

Our photo of the day comes from Cape San Blas, Florida.

Our photo of the day proves that size doesn't matter.