From when it happens to why – and everything in between – here's your crash course on the shortest day of the year.

Forget the idea that only 10-minute bursts of activity are important. New research finds that even small moments of activity can help you meet your goal.

Koalas aren't bears and they rarely drink water.

From their smart stripes to the power of their kicks, behold the wonders of zebras.

Fighting C. difficile with antibiotics is often a losing battle, but fecal transplant is novel treatment with FDA warning.

The world's most famous ring of standing stones has been studied for centuries, yet we learn something new about it all the time.

The benefits of fish oil are well-marketed, but here's a comprehensive look at the toxins, side effects and sustainability issues as well.

A primer on the deadly virus that has taken hold in Congo and scaring people around the globe.

Julia is part of Sesame Street's campaign to help kids with autism feel loved and accepted.

Paul Hawken's latest book, 'Drawdown: The Most Comprehensive Plan Ever Proposed to Reverse Global Warming,' focuses on fixes rather than fighting.

These feared and beloved predators are arriving on coffee tables, thanks to famed National Geographic photographer Brian Skerry.

Stephen Ritz, author of 'The Power of a Plant,' developed a curriculum for indoor gardening that is changing lives and improving schools.

In his book, "Endurance," astronaut Scott Kelly lays bare the highs and lows of living through NASA's longest single spaceflight.

From centuries-old temples to sleek modern masterpieces, libraries are some of humanity's most beautiful architectural accomplishments.

The Nordic nation gets bookish at the 2018 Venice Architecture Biennale with an exposition dubbed 'Mind-Building'

Ceisjan van Heerden won Bookends in Cardigan after the retiring owner held a raffle to find the new owner.

The Voynich Manuscript, an illustrated codex from Medieval times, has been baffling humans since 1912. Here's what we know about it.

Southeastern Ohio is the most rural region of its state. Sometimes referred to as Appalachian Ohio because it sits in the foothills of the famous eastern U.S. m

Jeju Island is not on many Western tourists' radar. This speck of land off the southern coast of South Korea is hugely popular amongst domestic tourists and is

Sitting in the Caribbean, only 56 miles from the coast of Florida, Grand Bahama is one of the closest major islands to the United States. Easy access from the N

Cartagena, Colombia's Caribbean port city, might not enjoy the name recognition of Bogota or even Medellin, but it has many of the features of a bona fide mains

Sardinia's true magic, especially from a nature-lover’s perspective, is its interior and its less-accessible sections of coastline.

The Portuguese city of Lisbon has been a hub for culture, commerce and exploration for centuries. The well-kept remnants of its colorful past make it an interes

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

Scientists from the Scripps Institution of Oceanography traveled out to a spot of sea 1,000 miles from shore and were sad to find plastic everywhere.

Ten eco-activists are wanted for a 20-day eco-adventure, sailing from Hawaii to Vancouver while studying plastic pollution in the oceans.

Can devoting 20 minutes a day to a green project make big eco-friendly waves? One oceans activist shows how a little time can make a big difference.

A shipping container filled with rubber duckies was lost at sea in 1992, and the bath toys are still washing ashore today.

At long last, Method is set to release the world's first soap container — or any sort of container, for that matter — made partially from plastic trash reco

Earth now has five or six major ocean garbage patches, and new research suggests they'll continue growing for 'at least the next thousand years.'

The Indian Ocean is the world's biggest plastic dumping ground, but some of it is leaking elsewhere.

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

Fewer manufacturers are using high fructose corn syrup in their products, but they aren’t making them less sweet.

Confused by the number of sugars and sweeteners on the market? Here's a comprehensive guide to the various natural sugars and artificial substitutes.

We get why the artists chose this common vegetable to represent America, but if you could choose a food, what would it be?

The soon-to-be-released documentary is a call to action to join the battle that must be won to ensure that today’s children live long, healthy lives.

Many people would prefer that sweets contain sugar and not high-fructose corn syrup. Hershey is considering giving them what they want.

In 'Allowed to Grow Old,' photographer Isa Leshko captures dignified portraits of elderly farm animals in sanctuaries.

In which we reveal that cows can swim, have accents and can smell things from 6 miles away.

Biodegradable items like apple cores or banana peels can be litter too. Here's an array of reasons why you shouldn't toss them outside.

By implementing 'housing first' on a national scale, Finland has almost eliminated homelessness.

Simply asking someone to coffee shouldn't be a big deal—for either gender. And dating would be less fraught if all singles asked others out more often.

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

A new study tracks more than 200 narcissists from the age of 18 to 41.

A new study looks at happiness among millenials who buy 'green' or buy less.

In today's busy world of unending errands and tasks, the feeling of time scarcity affects us all.

Denmark's Green Free School in Copenhagen focuses on creating a sustainable future for all.

Cucamelons look like baby watermelons and taste similar to cucumbers. Are they worth growing?

But what is lost when picked produce doesn't ripen for weeks or months?

Tired? Depressed? Nutrient deficiency might be to blame. You might not be getting the right amount of these vitamins & minerals.