193 nations are members of the United Nations

There are 6 primary governing bodies at the UN

The United Nations is structured around six main bodies: the General Assembly, Security Council, Economic and Social Council, Trusteeship Council, International Court of Justice, and Secretariat. Each plays a distinct role in promoting peace, justice, and cooperation worldwide.

The UN’s interactive site analyzing the world’s population

The 2022 revision of World Population Prospects contains the official population estimates and projections from the United Nations. It presents population estimates from 1950 to present for 237 countries or areas around the world. The data consider...

A majority in surveyed countries approve of the UN

A 2024 Pew Research Center survey found that a median of 58% across 35 countries viewed the UN favorably, while 31% held unfavorable views. Notably, younger adults tended to view the UN more positively than older generations. The report offers a detailed, country-by-country analysis of global perceptions of the UN.

Map of union membership by state

In the United States, unions exist across the entire country, but some states have more union members than others. Multiple reasons exist: from policy differences across states, to industrial and cultural influences. Want to learn more? Find out which state has the highest percentage of union membership, and which one has the lowest, through this map.

Federal systems are a minority among the United Nations' 193 members

Of the United Nations' 193 member countries, roughly two dozen use a federal system, dividing power constitutionally between national and subnational governments. This group includes the United States, India, Canada, Germany, and more. The video walks through examples of how these states operate.

The United Nations was founded in San Francisco in 1945

The 1945 San Francisco Conference brought together delegates from 50 nations to draft the United Nations Charter, laying the foundation for the UN. This archival footage from the UN captures the event's atmosphere, showcasing firsthand reactions and the global hope for peace after World War II.

See a gallery of art and architecture at New York City's UN building

The group's nearly 200 member states have contributed art and cultural experiences to the New York campus since the building's founding in 1950. This gallery hosts hundreds of photos of the art on the premises.

Mapping NATO's 32 countries across North America and Europe

See an updated map with the option to learn more about each country's membership and role in the alliance. The map shows the borders of its member countries with extra filters capable of locating its many civilian structures, nonmember partners, positions of missile sites, and more.

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.

The League of Nations was the predecessor to the UN—and the US never joined

The League of Nations—established in 1920 after World War I—was the first global organization aimed at maintaining world peace. Although US President Woodrow Wilson championed its creation, the United States never joined.

View when each UN member signed the Montreal Protocol

Adopted in 1987 to phase out ozone-depleting substances, the agreement achieved universal ratification by all 197 UN member states, making it the first and only such international treaty in the UN's history.

Learn about the history of the Universal Declaration of Human Rights

The Universal Declaration of Human Rights was adopted by the UN General Assembly in 1948. This video explains the history, purpose, preamble, and all 30 articles of the UDHR, which established a universal human rights standard for people worldwide.

The IMF was created to prevent the currency crises that destabilized the 1930s global economy

Founded in 1945, the IMF monitors exchange rates, promotes financial stability, and provides emergency funding to countries that cannot pay for their imports. It currently has 191 member countries and acts as a lender of last resort for struggling economies.

OPEC has grown from five to 12 members since 1960

OPEC’s official members page features profiles for all 12 current member countries—Algeria, Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia, UAE, and Venezuela—detailing their joining history, national data, and links to individual country pages.

China joined the WTO in 2001

After 15 years of negotiation, China joined the WTO as the 143rd member. This move gave it access to the global market in exchange for commitments to economic liberalization, despite skepticism from existing members about integrating a state-controlled economy into a free-market system.

See how global nuclear arsenals surged—then shrank—by country since 1945

Worldwide nuclear stockpiles peaked at over 60,000 warheads in the mid‑1980s during the US-Soviet arms race. Today, about nine nations collectively maintain roughly 12,000 warheads, with Russia and the US still holding the majority.

The Soviet Union explained

From 1922 to 1991, the Soviet Union spanned one-sixth of Earth’s landmass and housed nearly 300 million people. As the most significant test of Marxist governance, it sat at the center of the century’s defining struggle between capitalism and communism.

Ukraine has received over $300B in Western military and financial aid

Although not a member of NATO, Ukraine has received substantial support from Western nations, primarily the United States and the European Union, totaling more than $300B in military, financial, and humanitarian assistance.

The Big Ten is the oldest Division I collegiate athletic conference in the US

Established in 1896 with seven members, the Big Ten has expanded far beyond its Midwestern roots. As of 2024, it includes 18 schools—stretching coast to coast from Rutgers in New Jersey to UCLA in California.

See the list of monarchs who have addressed a joint session of the US Congress

Only 11 monarchs have ever addressed a joint meeting of Congress, beginning with Hawaii's King Kalakaua in 1874. King Charles III of the United Kingdom became the most recent in April 2026.

3 states did not officially ratify the Bill of Rights until 1939

Massachusetts, Connecticut, and Georgia originally rejected or tabled the amendments in 1791. With Virginia's ratification already clearing the three-fourths threshold of adoption, there was no legal pressure to revisit it—until all three states acted symbolically on the 150th anniversary of Congressional approval of the amendments.

A small island nation built the largest empire in history

See how Britain grew from a small kingdom into a global empire ruling nearly a third of the world, then unraveled through war, nationalist movements, and declining power—leaving just 14 overseas territories as remnants of its once-vast domain.

View a breakdown of the identified species on Earth

Over 2 million species have been documented by scientists, but there may be as many as a billion distinct species. The vast majority of the species on Earth are insects, while mammals form the smallest group.

The UN’s 1990s peacekeeping mission in Rwanda failed to prevent a genocide

During a 100-day period in 1994, nearly 1 million Tutsi and moderate Hutu civilians were murdered, a tragedy that exemplified the limitations of the UN’s ability to protect populations from mass killing.

Infinity can come in different sizes and be ordered by these sizes

Russian mathematician Georg Cantor demonstrated that certain sets of numbers (e.g., the natural numbers) form countable infinities, while others cannot be counted (e.g., the real numbers) and are therefore uncountable, representing larger versions of infinity. Through the axiom of choice, German mathematician Ernst Zermelo proved this concept of ordering infinities.

Explore the roughly 190 Egyptian pharaohs across 31 dynasties

The meticulous records kept by scribes in ancient Egypt allow contemporary historians the unusual ability to list the civilization's hundreds of monarchs, from the quasi-legendary Egyptian unifier Narmer (also known as Menes) all the way to the Roman emperors 3,000 years later.

Meet the 56 signers of the Declaration of Independence—most of whom didn't put pen to paper until August 2, 1776—and see their original signatures.

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

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.

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.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

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

Roughly 43 million US borrowers owe roughly $1.7T in student debt, the second-largest source of consumer debt behind mortgages.

This real-time tracking of the hantavirus cruise ship outbreak in May 2026 offers a unique glimpse into the global reach of the outbreak and whether the virus sickened passengers and their communities around the world.

Explore our favorite visualization of the immense scale of space, from an astronaut to the size of the observable universe

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 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.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.

While atoms are normally made of protons, neutrons, and electrons, exotic ones have been built with antimatter—alternate versions of normal matter that live for fractions of a second and are about a billion times as rare.

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

Explore a list of the 100 best novels of all time, compiled by some of the world's best living writers, including Salman Rushdie, Stephen King, and Jennifer Egan.

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.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people

In 1939, baseball star Lou Gehrig delivered his inspirational 'Luckiest Man' speech after retiring due to the health condition that now bears his name.

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

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.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.