In the 1960s, a vaccine for chlamydia made patients more susceptible to chlamydia. Now scientists know why

See the finalists of our 2014 photo contest and vote for the Readers' Choice winner

From swirling aurora borealis to bioluminescent beaches, these award-winning photographs capture rare views of our world at night

Michelle Frankfurter tells the stories of these young migrants and also those of the thousands who jump aboard “the death train”

See images of the American flag captured by our readers.

Iconic images of Dr. King from the Smithsonian collection

These grounded planes in the Congo have captured the imagination of these children

Getting the perfect shot requires great timing, the right equipment and nerves of steel

Get acquainted with the Big Apple’s major sights by browsing through these remarkable travel photos submitted to our photo contest

Take a virtual tour through the streets and sights of England’s capital city with these stunning travel photos submitted to our photo contest

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These amazing images from the Smithsonian Magazine Photo Contest show the Arctic animals at their fierce but adorable best

Once one of the world’s most dangerous border crossings, Berlin's symbol of death and division has been turned into a tangible way to experience history

Pedestrians in Montreal, Grand Rapids and other locations can time-travel thanks to installations that map historical scenes directly onto the cityscapes

In the late 19th century, city officials turned the final resting place for 10,000 souls into what's now Greenwich Village’s James J. Walker Park

See photographs of the beautiful natural wonders from the Smithsonian Magazine Photo Contest

Eight years into living in Longyearbyen, on the Norwegian archipelago of Svalbard, I embrace the seasonal plunge into total darkness

These images from the Smithsonian Magazine Photo Contest capture quintessentially Cuban scenes

From Setsubun in Japan to Fèt Gede in Haiti, these festivals relish in the macabre

From Scotland to Japan, these multiday treks offer adventure and a truly immersive experience

Cenotes in the Yucatán Peninsula are time capsules preserving remnants of Maya culture and fossils of extinct megafauna

The team traveled from New Zealand to Tonga along a humpback highway to collect environmental DNA and raise awareness of the plight of the marine mammals

These shots from the Smithsonian Magazine Photo Contest show why it’s one of the most-visited nations on earth

The Cuban-American actor and producer has stars on Hollywood’s Walk of Fame, but this new honor pays tribute to his start as a musician in South Florida

Sharks have been losing teeth for 400 million years. Here’s a guide to uncovering some of these plentiful fossils across the country

The 1951 artwork, "La Grande Dame (The Cat Woman)," stands over six feet tall and features paintings of "hybrid creatures and lush dreamscapes"

Mary, a 54-year-old Asian elephant at the Berlin Zoo, is the “queen of showering,” but her companion Anchali seems to have figured out how to exploit that habit to play pranks

Sławomir and Szymon Milewski were searching for a Roman road when they stumbled upon the cache of coins, which is worth more than $120,000

During a release of captive-bred snails in September, researchers discovered wild-born individuals from the Partula tohiveana species—which had been considered extinct in the wild—marking a huge milestone in a global effort to save them

A new study has shattered historians' long-held assumptions about some of the people who died in Mount Vesuvius' eruption in 79 C.E.

On this day in 1912, a team found the remains of Robert Falcon Scott and the crew of the "Terra Nova" expedition. A would-be rescuer said he was forever haunted by the "horrible nightmare"

It's not clear how the juvenile male ended up so far north, but experts suggest he was motivated by his appetite

‘Our goal is to provide full flexibility, 24/7,’ one resident said. ‘If you want to cut the lawn at 4 a.m., then you do it.’

The actress becomes the first wheelchair user ever to take home the coveted prize at the 73rd annual award show

This story and others have come to light during a project to translate and digitize a series of texts about archbishops in York, England

Some 250 volunteers transported more than 2,000 books

The Whitney Museum has been gifted 400 works by the famed pop artist, while the Smithsonian Archives of American Art will receive half a million documents

An investigation by David D. Kirkpatrick of the New York Times revealed the buyer's identity

An increasing number of people in France espouse a clothing-free lifestyle

The brick-built botanicals celebrate the UK’s 2017 City of Culture

Lula the bear and Simba the lion have been evacuated to a wildlife shelter in Jordan

It takes two weeks to dress the venue (which is in a mall, remember) for the occasion each year

It's not the first time savvy entrepreneurs have marketed canned air to tourists. Similar products have been sold at vacation destinations for decades

Once the first primate made a break, the 42 others followed suit in a simple case of monkey-see, monkey-do

While testing the "infinite monkey theorem," mathematicians found that the odds of a chimpanzee typing even a short phrase like "I chimp, therefore I am" before the death of the universe are 1 in 10 million billion billion

Found in a cremation cemetery in Belgium, the skeleton includes bones dating to the Neolithic period and a Roman-era skull, according to a new study

The viral king penguin chick at Sea Life Melbourne Aquarium is beginning to lose his youthful down, a process that will give him his distinctive and waterproof adult plumage