Here’s a look at 18 of the world’s most stunning treehouses and the unique stories behind them.

Alan Kimble Fahey, the hirsute ex-phone service technician behind a folksy, sprawling rural California compound known as Phonehenge West, is found guilty of vio

Artist and teacher Ruganzu Bruno Tusingwire wins the first 10K prize at TEDxQuatar with his innovative recycling idea that helps kids in need.

Filipino artist and environmentalist Vincent Francisco Navarro paid homage to coffee farmers by painting portraits of them with used grounds.

It's amazing what light can do when seen from the right angle. Check out this beautiful sunset sky from the mountains of Costa Rica.

The colorful world of topiary art starts with a plant and ends with a masterpiece. Here are 17 examples to inspire your creativity.

It sounds totally familiar, yet completely new.

The Chauvet paintings in France are a study in humanity's connection to animals, the earth, and each other over time.

There’s a new mosquito-borne virus in town, and it has some experts worried.

Skip the stretching and forget the sports drinks. Modern research is proving that many commonly held fitness beliefs just aren't true.

From what the new labels mean to how to properly apply it, here are the essentials to help keep your skin healthy in the sun.

In Stranger in the Woods, author Mike Finkel explores the famous Maine recluse Christopher Knight and why he stayed alone for 27 years.

Even if you haven't read some of the books in your library, they are still doing you good.

These vintage recipes ripped from magazines and the back of boxes are a snapshot of a culinary era.

'The Art and Science of Ernst Haeckel' is a collection of beautifully illustrated flora and fauna by a German biologist and artist.

The best underwater images from the Natural History Museum's annual wildlife photographer competition make up 'Unforgettable Underwater Photography.'

From a moose to a tick, from a coyote to a cockroach, author Rachel Levin walks us through what to do in her book, "Look Big."

Juneau is Alaska's unassuming capital city. Since it is located on the state's southern panhandle, it is influenced by the weather patterns of the Pacific Ocean

Michigan's Upper Peninsula is one of the most rural, nature-dominated regions in the Midwest. It is virtually surrounded by Great Lakes, with Lake Superior to i

Gorgeous sunsets, abundant wildlife and serenity can be found just a ferry ride away from Seattle.

A new animation shows the path of the debris carried out to sea by last year's massive tsunami in Japan. The tsunami triggered by the devastating earthquake tha

The trash accumulating in the Pacific Ocean — scientists estimate there are 1.5 million tons of tsunami debris alone — is arriving on the West Coast.

Tern Island is so besieged by garbage it may become the first U.S. hazardous-waste site whose main problem is plastic.

A single-celled, coral-killing creature with 'devil horns' has been found on microplastics in the open ocean.

Divers scoured remote Pacific atolls to collect the garbage, some of which had entangled sea turtles.

This explore.org film shows how service dog Abby and others helped in the aftermath of Sept. 11, 2001.

A dog lost in Florida is found a dozen years later in Pennsylvania, and her owner and everyone else is in tears.

Vietnam veteran gets his dying wish to spend the day with his beloved dog.

Photographers Kelly Pratt and Ian Kreidich capture ballet dancers and dogs in playful moments together.

Ongoing research raises red flags — enough to suggest you shouldn't use it on kids.

A muffin with the same amont of calories as ten chocolate donuts? A pretzel with more saturated fat than a Big Mac? Read it and weep.

A zero-waste lifestyle isn't as hard as it sounds. These simple steps are the gateway to living a zero-waste lifestyle.

Researchers say they've identified a universal code of human morality.

Spontaneous by nature, desire paths are the most optimal way to get from point A to B as decided by pedestrians, not planners.

Study finds that giving funds to poor families also helps others in the community.

In 8 years, the Empowerment Plan nonprofit has distributed 35,000 coats to the homeless and hired 80 people.

Try this seasonal recipe for a cocktail created at the Inn at Cedar Falls in Ohio.

Indian automaker Tata will be bringing the inexpensive Nano to the U.S. within three years.

Chevrolet will be bringing its clean diesel technology to the domestic Cruze lineup.

Colleges and high schools have gathered in Detroit to show off their super-efficient home-built hot rods. Meanwhile, Shell is building its own fuel miser.

Scientists have created a sonic "tractor beam" that can pull, push and pirouette objects that levitate in thin air.

A prototype lunar rover that was sold to a scrapyard and reported by NASA to be lost has now been found.

What the Flux? No Sign of Aliens Around Strange, Dimming Star

For the first time ever, astronomers have directly observed planets in the process of being born.

A tiny satellite built by grade schoolers may get a little help from above during its launch.

Researchers will likely never know what happened to the crew of the Catalina PBY-5.

Angkor Wat Yields Astounding Buried Towers & Spiral Structure

The glass plates depict solar and lunar eclipses, comets, and even views of binary stars.

This opposition, which occurs every 2 years, is considered relatively favorable and precedes another event when Mars will be at its closest to Earth all year.

Biologists were surprised to find carnivorous pitcher plants eating vertebrates, which may be a first for North America.