The US tried to buy Greenland in 1867 and after World War II

How glaciers melt

Greenland and Antarctica are home to most of the world’s glacial ice, including its only two ice sheets, making them areas of particular interest to scientists. Watch this three-minute video to learn why understanding them is not just interesting, but crucial to our near-term adaptability and our long term survival in a changing world.

Who was Gudrid the Far-Traveled?

Considered one of the greatest female explorers of all time, Gudrid the Far-Traveled counted among her in-laws Erik the Red and Leif Erikson. Traveling from Medieval Europe to North America via Iceland and Greenland, Gudrid became the first European woman known to have given birth in North America. This article details the pioneering achievements of medieval Europe's greatest female explorer.

Who discovered the North Pole?

In 1909, papers reported two separate expeditions had become the first to reach the North Pole. This podcast explores the fascinating and terrifying attempts to reach the remote marker, and the contentious race to become the first person to plant...

The US handed control of the canal back to Panama in 1999

This was the result of two treaties signed during President Jimmy Carter's presidency, one shifting control to Panama and the other declaring the canal zone neutral. In recent years, US officials have suggested the US may retake control. Experts agree that the only viable way would be through military force.

Null Island is located at a latitude and longitude of 0°

A buoy denotes the fictional island where the Prime Meridian intersects with the equator in the Atlantic Ocean. Nations had disagreed on where the "origin" of world maps should be located until the Prime Meridian and Greenwich Mean Time were established in 1884.

Norway is responsible for salmon sushi

Japanese sushi did not include salmon until the mid-1990s because Pacific salmon was known to contain parasites. Norway, meanwhile, had an abundance of Atlantic salmon, which was safe to eat raw. The country smelled an opportunity and launched Project Japan, which successfully convinced the country that Atlantic salmon was safe to include in its cuisine.

The Detroit 59ers moved to Alaska to develop the land

After Alaska became a state in 1959, 21 Detroit families set out for the Last Frontier, intent on cultivating the land through the Homestead Act. The act offered free land in the state for anyone who met the requirements for developing its sparsely populated areas.

The 1974 anarchist protest in Denmark that later inspired SantaCon

An interview with one of the participants explains what the performance art group that planned the event was hoping to achieve. Hordes of Santas walking down the street with a giant goose, attacking buildings with backhoes and pickaxes, handing out “presents” stolen from department stores, and eventually being arrested.

See how the income taxes in the US compare to other countries

The US's highest marginal income tax rate is 37%. That rate is compared to other countries' both in a map and accompanying chart. Denmark has the highest rate at nearly 56%, while a handful of countries don't use marginal taxes at all. In the Middle East, many countries count on oil and gas to finance their governments.

Danish cookies became a treasured Lunar New Year gift, thanks to their unique tin container

Hong Kong experienced an economic boom in the 1970s, which led to snacking, including on Western foods, becoming a cultural norm. Kjeldsens butter cookies became a popular treat, and their packaging, a distinct tin container, presented them as more refined than a simple snack. Instead, they were considered a worthwhile present for Lunar New Year.

New York was once called New Amsterdam

Although New York has a long history, it wasn’t actually called “New York” until the late 1600s, when the English beat out the Dutch for control of the area. In 1664, Dutch Governor Peter Stuyvesant surrendered what used to be known as “New Amsterdam” to the English, who renamed it New York after the Duke of York.

Like nuclear power, US geothermal power plant construction stalled for decades

Development and investment into geothermal energy took off in the 1960s. However, by the 1980s, companies repeatedly failed to find reservoirs of hot water when exploring new locations, and investors lost interest in the expensive drilling required. By the 2020s, technological advancements had finally helped mitigate exploration risk and expand viable drilling locations.

Danish moms have a built-in support group through the healthcare system

Local Danish health departments put these groups together, assigning mothers into small support groups comprised of mothers in roughly the same area who gave birth around the same time. The purpose of the groups is to create a supportive network of new parents who can benefit from one another's experiences. The group's mothers decide how often to meet and what to discuss.

George Washington spent thousands of dollars on ice cream in a single summer

Records show that America's first president purchased a "cream machine for ice" as early as 1784. An accounting record from 1790 reveals that Washington spent $200—roughly equivalent to $6,300 today—on ice cream.

Rare chance for US states to see Northern Lights

A solar storm in July 2023 offered people in 17 American states, as well as Canada, an unusual chance to witness the Northern Lights, or aurora borealis. The 11-year solar cycle, reaching its peak in 2024, made the lights visible in places further south than usual. Read up on the announcement from the Geophysical Institute at the University of Alaska at Fairbanks here.

Compare the true size of any country

This interactive lets you drag any country across the conventional Mercator projection to compare its true size to others. Africa, which appears similar in size to Greenland on standard maps, is actually close to 15 times larger. It's a great way to recalibrate your assumptions about world geography.

When German submarines lurked in US coastal waters

During World War II, German submarines (also known as U-boats) prowled the Southern coast of the US in 1942 and 1943, sinking more than 60 ships and killing 600 Allied soldiers. The campaign is less well-known, since the major battles in Stalingrad and Midway happened at the time. Several of these submarines and the ships they sank are now popular diving spots.

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.

One Canadian town operates a polar bear jail

The town of Churchill has a population of 850 humans and just as many polar bears. In an effort to prevent hungry bears from breaking into homes or attacking residents, the town began imprisoning them for 30-day stints.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

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.

National parks, explained

Roughly 83 million acres of the United States are set aside as federal National Parks land, an area large as Germany. From the original Yellowstone Park to small monuments and memorials, learn the essentials on this portion of America dedicated to public enjoyment and recreation with our quick explainer video.

Countries tried to curb plastic waste, but the US keeps shipping more

Data show that American exporters continue to ship plastic waste overseas, often to poorer countries, even though most of the world has agreed to not accept it.

The title of 'World’s Largest Christmas Tree' is disputed

Cities in the US, Italy, Germany, and the Netherlands all claim they have the world’s largest Christmas tree—ranging from massive evergreens, TV and communication towers, and hillside light displays.

Voting rights expanded from 6% of Americans in 1789 to nearly all adult citizens today

In the first US election, only white male property owners—about 6% of the population—could vote. Constitutional amendments culminating in the 26th Amendment gradually expanded voting rights to nearly all citizens aged 18 and older.

The Declaration has survived centuries of travel, damage, and preservation missteps

This piece traces the Declaration's 200-year journey from its creation in 1776 through repeated relocations, risky copying methods, light damage, fires, wartime evacuation, and shifting federal custody—long before modern archival protections existed.

Learn about the violent history of the nutmeg industry

From the 1600s to the 1860s, the Dutch East India Company enslaved thousands of people on the Banda Islands, the world's only nutmeg source, forcing them to work on plantations under a system unlike anything seen in the Caribbean or American South.

Scientists can determine Earth's past climate conditions by analyzing air trapped in microscopic bubbles within ice cores—columns of compressed snow layers that build up over hundreds of thousands of years.

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

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 history of many kitchen appliances involves unexpected discoveries and applications, including wartime radar turned hamster defroster and replacing an 'ice king' with heat-stealing boxes.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

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

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.

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

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

Experimental hantavirus vaccines and therapies, still under development, have long been funded by the US military.

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

In 1915, workers recovered a submarine-like vessel from the Chicago River, prompting fears of German espionage

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.

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

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

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.