A map of slavery's spread across the US

Slavery in the US: a timeline

In 1619, a ship with 20 captives landed at Point Comfort in Virginia, ushering in the era of American slavery. Scroll through this timeline to learn more about slavery in the US and its long lasting effects.

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...

Nineteenth-century, hand-drawn infographics on US slavery and race

In the second half of the 19th century, researchers studying the behavior of the millions of emancipated Americans after the Civil War used "information graphics" to cut through the noise of racially charged debate. In this collection from Stanford, you can see century-old, stunningly hand-drawn data visualizations showing racial demographics, the effects of emancipation on cotton prices, and more.

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

Based on historical logs, this interactive maps shows info from various ports of departure and arrival during the height of the trans-Atlantic slave trade.

Track the changes in US immigration law throughout history

This interactive timeline tracks the development of US immigration law, overlaid with time-series data on percentages of the foreign-born population. Explore how each major policy development correlated with immigration levels, revealing the relationship between legislation and demographic change.

An interactive map of race and ethnicity across the US

This map by CNN shows race and ethnicity across the United States. America is more diverse and has more people than ever before. According to the 2020 census, much of its growth is occurring in and around metropolitan areas. By plotting the US...

See a timeline of colonial settlement in North America

This interactive timeline uses archival maps, illustrations, and documents to trace early American history—from the failed 1590 Roanoke colony and Indigenous accounts of a devastating smallpox epidemic to the political tensions that culminated in the Revolutionary War.

What was life like as a slave in the US?

Over 2,500 former slaves were interviewed by writers and journalists in the late 1930s as part of the US Federal Writer's Project. The collection recorded images and firsthand verbal accounts of life as a slave, eight of which are highlighted in this article at the Library of Congress. See the humanity in each of these individuals with their firsthand accounts.

A primary source timeline of US history (1600-1968)

Compiled by the Library of Congress, this archive walks through important events in US history through civil rights era, while providing primary sources to explore.

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.

Charting 4,000 years of human history

Care to hang all of human history on your wall? This data visualization charts 4,000 years of humanity. This "histomap" was originally published in 1931 and sold for $1 per copy of the 5-foot-long chart. It was said to detail the course of...

See the results of all 59 presidential elections from 1789 to 2024

This interactive tool lets users explore the outcomes of every US presidential election from George Washington's uncontested 1789 victory through 2024, showing how electoral votes, state results, and shifting coalitions shaped each race.

Where was the Civil War fought?

The Civil War is commonly described as a war between northern and southern US states, but where was the war actually fought? Watch this interactive map and timeline to see who fought who and when. Click on specific battles to learn more about each fight.

Poverty rates by US state

As of 2022, 37.9 million people in the US were living in poverty. But those people aren't evenly distributed among the 50 states. Some states and regions of the country are more impoverished than others. For instance, US poverty rates are relatively higher in the South than they are in the North. See the state-by-state breakdown with this map.

Visualize the global Venezuelan diaspora

This visualization maps Venezuela’s mass diaspora, showing how millions have fled abroad—primarily to Latin America, with significant flows to the US and Europe—creating one of the most significant displacement crises in the world.

Learn how Mexico’s anti-slavery stance shaped the US–Texas conflict

Historian Alice Baumgartner explores how Mexico’s abolition of slavery clashed with Anglo settlers' ambitions in Texas. The episode reveals how enslaved people fled south to freedom, reshaping the politics that led to Texas independence and the Mexican-American War.

A map of those accused of witchcraft across Scotland

This data visualization pinpoints where accused Scottish witches lived during the witch hunts, of which there were five waves. This map also allows viewers to see the social class of the accused and where they died and were tried. Viewers also can...

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

See the progress of the war in this interactive, visual timeline

Follow the progress Russian/Ukrainian War through this interactive map. Watch as events develop, get a daily overview of movements, and switch back and forth between different dates and time periods during the conflict. Results will change in real time and depending on all available information about troop movements and more.

The South built its wealth largely from slave labor

Before the Civil War, the Southern economy relied on roughly 4 million enslaved people producing cash crops such as cotton, rice, and sugarcane. Their forced labor generated immense profits—the South produced 75% of the world's cotton by 1860.

See the world’s largest stock markets in 1900 versus 2023

The US is now home to the world's largest stock market, but that wasn't always the case. This data visualization shows where the largest stock markets in the world were in 1900, then compares that map to the current geographical distribution of stock markets today, based on each country’s percentage share of global market capitalization. See what it looks like by clicking here.

Visualizing US state taxes in seven charts

Ever wondered how your state’s tax system compares to others? Here’s an overview of the US state tax system based on seven visualizations.

The Missouri Compromise temporarily eased tensions over slavery's expansion

Passed in 1820, the Missouri Compromise admitted Missouri as a slave state and Maine as a free state—maintaining the fragile balance between proslavery and antislavery states in Congress. It also banned slavery north of latitude 36°30′.

US marshals conducted the national census for nearly a century

From 1790 to 1870, US marshals handled the national census, gathering population data from every district. The responsibility was gradually transferred to a separate federal office that would officially become the Census Bureau in 1902.

The essential facts to know about ancient Egypt

Ancient Egypt spanned three millennia—more than 10 times the history of the US—but disappeared from the world's consciousness until the 18th century when it was rediscovered by Napoleon's army. Take a trip through the dynastic periods in this three-minute video.

See the geographic spread and incidence of malaria

This graphic shows the estimated global burden of malaria in 2025 as new cases per 1000 people at risk.

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.

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.

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

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.

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.

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

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

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

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.

View the ten deadliest tornadoes in US history.

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

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.

See the most iconic photos from four decades of LIFE magazine

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

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

The first line of 'immortal' human cells, which can divide indefinitely and are used in scientific research, was nonconsensually taken from a Black woman.

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

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.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

About 12.5% of US adults experience a phobia in their lifetime, a diagnosis that hinges on the intense fear interfering with daily life and persisting for at least six months.

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.