Photographer Josh Hydeman has made it his mission to illuminate America's caves and spark interest in what lies beneath.

It's a long story involving snow gods, the director's next film, and big money for the ski town. Take a seat.

See Old Faithful erupt in person or on your phone

Europe's lowlands are becoming the mecca of solar-powered bike paths. We especially like this take on Van Gogh’s most famous work.

Dozens of visitors approach animals for photos

Review site offers 28,000 companies' services through online booking portal

Similar to compound banned for major health risks

New film series envisions nature as force, not victim

Finishes more than an hour ahead of next woman

Two-thirds of planet absent from program

Marathon-racing CEOs linked to more valuable firms

Population could reach 12.3 billion by 2100

Drug cartels no longer barrier to enjoying "most dangerous national park"

State law requires 3-foot buffer from cars

Rainforest structure will be tallest in South America

Formula E series kicks off with a crash

Find and charter a captain who floats your boat

Wants hikers to get off the grid by bringing it with them

Japanese capital tops survery list, with Rio de Janeiro at bottom

Bayou expected to disappear in the next 50 years

US Airways flights to be withdrawn September 1

This cruel new wearable will shock you if you don't exercise.

"No Turning Back" tour begins October 18

While wearing Rapha, riding Specialized

Mountain biker jumps 100 feet, 3 inches

28 bike flats caused by tacks strewn along route

Discovery might halt future Mojave Desert solar installations

Plans to nearly double the size of its San Diego killer whale environment

Illegal rhino killings up 7,623% in six years

When it comes to staying hydrated, you need the right bottle for any activity.

What's next for the maker of portable solar products

Google's FASTER project will double connection speeds

One man and his canine pal cover 13,000 miles in 32 states to discover just how strong our relationship is with man's best friend.

Phones detect sounds of illegal logging

First of two tropical cyclones hits today

Demand for almonds up 220% since 2005

Bass-heavy music empowers, boosts performance

British climate projections show impact on global resources.

Death by flood less common than by lightning

No environmental hazards or foul play suspected

Man biking 1,840 miles against doctors' orders

Gentle giants save more than 850 lives annually

Thanks to a $2.4 million bike path, not Putin

If there's attention being doled out, your dog wants it.

Walk the 1,800-foot bridge, then leap overboard. If you dare.

World's third-largest facility funded, designed, made by Americans

UAVs are heroes when it comes to protecting the environment

$1.3 million Exosuit will take divers to depths of 1,000 feet

New technology identifies bird songs

It costs only $3 million, but there's a catch

State will impose emergency bans on wasteful practices in August

Crowdfunding project to create year-round indoor facility

Spartan Racing, Reebok, and NBC announce multiyear rights deal

Contador becomes the second prerace favorite to exit

Three plane fuselages in a Montana river might seem like a problem, but there’s more to the accident than meets the eye.

Train? Nah, just falsify your qualifying times

Company to host gourmet 3D-printed meal with robot waiters

Lost bags, delayed flights, and a lack of transparency

World's largest subterranean jump park opens Friday

Introduces "Happiness Blankets" to monitor passengers' brainwaves

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