South Korea is separated from North Korea by a demilitarized zone

There is a nature preserve in Korea's DMZ

In almost every way, the Demilitarized Zone is a depressing place, a testament to humans' inability to make peace. There is one surprising upside: Keeping people away has allowed nature to thrive. Recently released images offer a 360-degree view of some of the hundreds of endangered species making a comeback in the DMZ, including white-naped cranes, mountain goats, musk deer, and golden eagles.

See South Korea's nighttime light usage, far surpassing North Korea's

You can tell a lot about a place by looking at satellite imagery of the earth at night. Economists use such images to study poverty and inequality, especially about secretive countries where it can be difficult to get information any other way. An image from NASA’s Earth Observatory shows the difference in electrification between North and South Korea (and the lights illuminating the DMZ are visible from space).

Imagining the reunification of the Koreas

The idea of reunifying North and South Korea has been a geopolitical dream for years, though one that feels perpetually out of reach. That hasn’t kept some from imagining it, though. Reddit user Aofen created a set of maps that postulate what effect a hypothetical reunification would have on population numbers, birth rates, median income, political affiliation, and more.

North Korea country profile

North Korea has often been described as one of the world’s most secretive societies. Learn the basics about the Democratic People’s Republic of North Korea with this breakdown from the BBC. North Korea emerged in 1948, following the end of the Second World War. Today, it remains one of the few countries still (nominally) under communist rule. Key facts unpack the realities of everyday life inside North Korea.

The US and South Korea have a robust, if delicate, alliance

The deep ties between South Korea and the United States go back decades, but the relationship hasn’t always been frictionless. When two off-duty American servicemen accidentally killed two South Korean middle-school girls in 2002, it set off anti-American protests that led South Korea to seek a more balanced relationship. The Council on Foreign Relations traces key moments in the two countries’ seven-decade history.

How life ranks in South Korea

As South Korea developed over the last half of the 20th century, quality of life soared. The country now outperforms the world average when it comes to education, health, and civic engagement, according to the OECD’s Better Life Index. In this dashboard, you can see where South Korea ranks in terms of housing, jobs, income, and more, and compare it against other developed countries.

South Korea has the lowest fertility rate in the world

If current birthing trends persist, every hundred South Koreans today will have only six great-grandchildren between them. This crisis is a result of high expenses, harsh work-family trade-offs for women, declining marriage rates, and other societal factors. Some newer policies are helping to build incentives for having children, but larger issues also need to be addressed.

Wealthy, 'chaebol' families rule South Korea's economy

A handful of huge family-run conglomerates, or chaebol, are the engines of South Korea’s economy, with Samsung alone representing 20% of the country’s GDP. This gives the chaebol (literally “wealth group”) outsized power, often leading to corruption, labor violations, and anticompetitive practices. One economist interviewed in this Vice documentary says the chaebol have replaced Korean democracy with corporatocracy.

Visualizing the symbols and history of world flags

More than 200 world flags feature high-intent designs, projecting ideals and values to the world through archetypal symbols, colors, and shapes. This page effectively depicts the data behind symbol and shape usage, how much each country's flag has changed over time, the most popular colors used, and more in a series of elegantly simple charts.

South Korea's decades long effort to build a new capital

South Korea has spent decades trying to ease overcrowding in Seoul by developing Sejong City as a new administrative hub. Named after the king who created Hangul, Sejong was designed to decentralize government functions—but slow population growth and limited transit have complicated the plan.

A digital archive of the Korean War

The Korean War largely shaped the evolution of the Cold War in Asia. Explore the Wilson Center’s digital collection of primary sources—including essays, profiles, popular documents, and a timeline—to learn about the Korean War. In 1945, the...

K-pop is defined by catchy music, synchronized dances, and devoted fans

Thanks to its eye-catching aesthetics and catchy music, South Korean pop has sparked a global industry. Both their sound and visuals are meant to be fun and addictive to consume.

How to eat Korean food

If you don’t know your banchan from your bibimbap, Chef Seoyoung Jung offers a quick breakdown of the anatomy of a typical Korean meal. She also gives some useful do's and don'ts for Korean mealtimes, including why you should always place your rice bowl to the left of the soup bowl (and never pick it up while you’re eating)

North Korea's Kim Jong Un travels in a train with a helicopter and antiaircraft guns

The train, known as the Taeyangho (or "sun"), is a moving fortress, the country's equivalent of Air Force One. Its windows are bulletproof, exteriors built to withstand explosions, and heavy with armaments. Kim claims the train helps signal closeness to the people.

Seven of South Korea's presidents have left office before their term ended

Recently removed President Yoon Suk Yeol isn’t the first South Korean leader to face turmoil at home. As this Voice of America piece shows, at least seven of the country’s 20th-century heads of state saw their political careers (and, in some cases, their lives) come to an abrupt and sometimes violent end.

Red is deeply symbolic in Chinese culture

Since the bold hue warded off the mythical Nian, the color red has come to represent luck, prosperity, and celebration. If you come across a home or neighborhood preparing for new year celebrations, you'll see red lanterns, wall hangings, clothing, and more.

The wall separating East and West Berlin was a highly visible symbol of the Cold War

Built in 1961, the Berlin Wall physically separated East and West Berlin for nearly three decades—preventing East Germans from fleeing to the West. Its fall in 1989 signaled the collapse of communist regimes across Eastern Europe.

South Korean artist uses her own body as a canvas

Dain Yoon is a South Korean artist whose whimsical paintings utilizing her body as a canvas have gone viral. See examples of her works where she uses her face and torso to present elaborate, often surreal, visual works.

The National Security Council advises the president on foreign policy and national defense

Created in 1947, the NSC coordinates military, diplomatic, and intelligence policy matters. Chaired by the president, it includes key Cabinet officials and senior advisers who shape American responses to global crises and security threats.

China vs. Taiwan, explained

Taiwan and China are separated by just 100 miles of water, but the distance between the two countries is farther than that. This 14-minute video details the history of their sovereignty dispute, and China's likelihood to use military tactics if they can't unify peacefully. The main problem there is that the United States has vowed to defend Taiwan, which could lead to an American-Chinese war.

Countries with either very low or very high religious diversity tend to be more peaceful

Research found a correlation between a country's relative stability and whether it has either very low or very high levels of religious diversity. Countries in the middle range—with moderate diversity and active competition between groups—show higher levels of conflict.

South Africa: the only nation to build nuclear weapons—and dismantle them by choice

During the 1980s, South Africa secretly built six uranium "gun‑type" nuclear bombs. In the 1990s, the government dismantled all its weapons and joined the NPT in 1991—the only country to fully reverse its nuclear program.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

Who won the Vietnam War?

Who won the Vietnam War? The question of who won the Vietnam War has been a subject of debate, and the answer depends on the definition of victory. This Encyclopædia Britannica article explains why this question hasn't been definitively answered despite the two halves of Vietnam now existing under one flag.

The Kármán line is a suggested boundary between Earth and outer space

Beyond this line, approximately 100 kilometers above Earth's surface, aerodynamic lift is insufficient to keep aircraft aloft without special propulsion systems. The United Nations has historically accepted the line as delineating the boundary of space.

11 states formed the Confederacy, with 2 others claiming allegiance

Between December 1860 and June 1861, 11 Southern states officially seceded to form the Confederacy. Pro-Confederate factions in Missouri and Kentucky also declared secession, but both states remained largely under Union control throughout the war.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

In 2026, Finland was named the world's happiest country for the ninth consecutive year based on its wealth, social safety network, and high life expectancy, among other factors.

The Great Salt Lake's distinct dual coloration results from high-salinity organisms that only live in the northern portion and produce a purple protein.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

All rainbows are 'raincircles' caused by water droplets separating white sunlight into a spectrum of colors, but Earth's surface blocks the bottom half of the circle from our line of sight.

According to the physics of black holes, our 4D reality may be a hologram—a projection of information coded on a 2D surface on the edge of the universe.

Coral reefs get their colors from zooxanthellae—microorganisms that line corals' digestive tracts and provide them with sugars in exchange for a home within this protective tissue.

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

Learn how your body is, scientifically, like a firework with its own slow, controlled burn.

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

Crows are believed to have intelligence on par with a seven-year-old child and demonstrate complex behaviors, from problem-solving with tools to recognizing human faces.

Explore what it's like inside a patient isolation unit, used in situations such as treating a patient or suspected patient with Ebola.

The syncytiotrophoblast is the outer layer of the placenta and the largest human cell, spanning an area about twice that of a king-sized bedsheet.

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

Mid-century modern graphic designers, known for their bright colors and bold lines in advertising, also found success with children's books.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

While El Niño moves warm Pacific Ocean waters east along the equator, La Niña moves them west, shifting where rainfall will become more common for months.