Mapping the known ports involved in the trans-Atlantic slave trade

A timelapse mapping more than 30,000 Transatlantic slave ship voyages

Roughly 12 million people from Africa were forcibly moved to North and South America over two centuries. This map meticulously showcases every ship's origin, destination, timeline, and more, revealing the scale of the Transatlantic slave trade.

Trans-Atlantic and intra-American slavery: a visual database

This interactive database provides insight into the trading of enslaved Africans across the Atlantic. This database offers maps, articles, timelapses, videos of 3D slave ship models, and searchable databases on enslavers and the enslaved. According...

Visualizing the trans-Atlantic slave trade in two minutes

This animation shows all recorded slave shipments from the 16th to 19th centuries, conceptualizing not only the slave trade with America but South America as well.

A map of slavery's spread across the US

Need a visual on how prevalent slavery was in the US? Scroll through this interactive map and timeline based on census data from 1790 to 1860.

Mapping the route options between the Pacific and Atlantic

This map shows some of the alternative trade route options that are available to shipping companies, from overland routes that rely on railways to transport goods coast-to-coast, to Arctic Ocean passages.

See the real-time numbers of ships traversing the canal each day

This platform uses satellite data to track chokepoints and trade disruptions along the shipping lanes that crisscross the globe. Search for data from more than 1,600 ports, or run the climate scenario simulator.

See a data visualization of the East India Company's trade

This tool visualizes the East India Company’s trade from 1760 to 1834, letting you track shipments of tea, textiles, metals, and more. Users can sort by commodity, origin, destination, and date to see London’s vast imperial supply network that shaped the British Empire.

Markers along the Underground Railroad

An interactive map of all National Park Service designated sites that were part of the Underground Railroad, helping shuttle escaped enslaved people to freedom.

Mapping the origins of the world's crops

Food has evolved alongside humanity, and through globalized trade, much of the world can enjoy foods once isolated to one region. Examine where your favorite foods originated from and see how diet differs across cultures with these interactive...

Maritime trade in the Mediterranean accelerated during the late Bronze Age

This map illustrates the vibrant trade networks of the eastern Mediterranean during the Late Bronze Age (circa 1500–1200 BCE), highlighting an era of growing interconnectivity among major powers including Egypt, the Hittite Empire, Mesopotamia, and others.

European colonization contributed to coffee's spread

European colonization created channels for large-scale coffee exports with workforces based in Asia, Latin America and the Caribbean. Trade routes throughout the Middle East and the rest of the world carried the drink to new shores and changed the agricultural and economic landscapes of the countries in the Bean Belt.

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

This podcast delves into the history of Periplaneta americana and explores why the bugs elicit such fear, disgust, and, at times, shame. The bug likely climbed aboard the slave ships because they had both unprotected food sources and places to hide during their journey.

One in five 16th century Spanish ships sank while crossing the Atlantic

Despite the incredibly high rate of catastrophic wrecks, during the Age of Exploration Spanish investors continued to fund voyages. Here, economists break down the incentives that led to increased risk, including short travel seasons and the propensity to overload ships.

Maps of murder across medieval England

These interactive maps show the sites of murders across York, Oxford, and London during the 14th Century. Explore the data by clicking site pins or experimenting with map filters, including crime scene type and murder weapon. Each pin includes a blurb on what researchers concluded about the attack, such as how a fight between the London fishmonger and skinner guilds during August 1340 ultimately left one man dead.

The Gold Road: how the medieval empires of West Africa traded across the Sahara

Throughout the Middle Ages, the West African empires of Ghana, Mali, and Songhai moved valuables across the Sahara and as far north as France using the Gold Road. This route enabled the trade of gold, ceramics, manuscripts, ivory, religion, and...

An interactive investigation into drugs and migration in San Francisco

This interactive article investigates the connection between the boom in US migration from Honduras and drug dealing in San Francisco. A high concentration of Hondurans are fleeing Siria Valley, where poverty and national murder rates run high...

A map of WWII refugees and their stories

Trace the paths of different people and families on this interactive map as they made their escape from the Nazi regime. Primary and secondary sources like letters, documents, memoirs and diaries, photos, interviews, and news clippings showed how many found a path to freedom, from the Kindertransport to individual stories.

How long it takes to travel by train from various cities

This interactive allows users to see how long it would take to move from one city to another in Europe via trains.

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.

In 1711, the New York City Common Council decided that the city’s slave market would operate on Wall Street

In 1711, the New York City Common Council decided that the city’s slave market would operate on Wall Street. Back then, the nation’s economy rode on the backs of slave labor and the slave trade itself—meaning that the slave market’s location was an economic hub for the city.

The transatlantic cable allowed for communications between North America and Europe

It had significant impacts on just about every industry, including finance. Specifically, the transatlantic cable made it so that real-time financial transactions could take place across the Atlantic, and allowed for much faster sharing of information that increased global market accuracy.

Hamilton learned about global trade before he was a teenager

Before he moved to America, Hamilton worked as a clerk around age 12 at the Caribbean trading firm Beekman and Cruger, handling shipping documents, inspections, and port logistics. He eventually managed the day-to-day operations of a trading charter that immersed him early in Atlantic commerce.

Visualizing the growth of botnets

Botnets are a network of computers that have been infected with a variant of malware that coordinates and leverages them for automated mass attacks such as data theft and crashing servers. This interactive map highlights where botnets have been located between 2014-2020.

Explore a world map of coral reefs and the extent of coral bleaching

The Allen Coral Atlas provides imagery of shallow water reefs, along with maps of potential bleaching events, bleaching alert areas, and bleaching hotspots derived from satellite imagery of whitening. Coral reefs are most prevalent in the Indo-Pacific, the Caribbean, the Red Sea, and the tropical coasts of South America and Africa.

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

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

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 this hantavirus cruise ship outbreak case map from May 2026

Assembled from case information from state and health agencies, this detailed mapping includes the last known locations of each confirmed, deceased, and suspected case and their status.

An interactive history of Calypso, the Caribbean protest music genre

Before reggae and ska in the US, there was calypso, a protest genre developed in Trinidad and Tobago in the 1800s. This resource brings together images, descriptions, audio, and videos to teach you the origins of a massively influential musical genre.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

Track the location of the Voyager probes, currently between 13 and 15 billion miles away from Earth.

See how Ebola tore through Guinea, Sierra Leone, and Liberia in 2014-2016.

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

Watch how deep-sea mining equipment collects and processes polymetallic nodules—metal-rich, potato-shaped rocks—from the ocean floor and creates environmentally damaging plumes of sediments.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

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

Browse a detailed visual analysis of over 200,000 similes—comparisons that often use 'like' or 'as'—from popular fiction to see how frequently writers the same idiomatic expressions.

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.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

Search a massive database of over 4 decades of clues from the TV quiz show 'Jeopardy!'

Electrical grids worldwide must double their power delivery capacity by 2050 to meet surging demand from AI and electric vehicles.

Play the role of a student in a game where you try to navigate college and remain debt-free, selecting different income levels, high school experience, race, ethnicity, and more.

Quincy Jones' 'Big Band Bossa Nova' helped introduce bossa nova—a jazz-influenced Brazilian genre—to the US

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

Alzheimer's can lead to brain shrinkage, with an average of around 2% of volume reduction per year

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight