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.

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

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

The long-lost art of coded postage stamps

In the 1800s, the postcard was a relatively new phenomenon, as was the post office. In the burgeoning system, recipients of mail had to sometimes pay prohibitively costly fees to receive it. So to get around the fees, a system of placing stamps on the envelopes in specific ways to communicate—a simple yes or no—was devised by clever mailers and expanded and codified by postcard companies into guides. Learn about the fascinating system here.

Mark Twain had many gripes with the US Postal Service

Twain often complained about the cost of postage and the service's inefficiencies, often sharing these criticisms in newspaper opinion pieces. Still, in 1907, the USPS issued a commemorative stamp featuring his face.

The USPS spent $3.97B in 2024, accounting for .058% of the federal budget.

Mark Twain spent decades feuding with the US Postal Service, convinced its costs and regulations were bureaucratic overreach.

The USPS spent $3.97B in 2024, accounting for .058% of the federal budget.

100 years of passenger air travel: a visual guide

This interactive timeline covers the first 100 years of passenger air travel, which was created in 1925 when the U.S. Post Office allowed private airlines to start delivering mail.

Learn about the long and contested history of free speech in America

This podcast examines how American free speech protections evolved—from the Founders' debates to landmark Supreme Court rulings—and why the country arrived at one of the most expansive speech regimes in the world.

The Washington Post's 'Presidential' podcast tells the story of every American president

Hosted by Lillian Cunningham, "Presidential" explores how each president rose to power, led through crises, and shaped the office. Featuring historians like David McCullough and journalists like Bob Woodward, the series traces leadership and legacy across American history.

See a timeline of American Express' history

Since its founding in 1850, American Express has evolved from a mail delivery service to a multinational financial services company. Small additions to the company over time, such as taking money orders and inventing traveler's cheques, were key drivers of the company's transformation.

The story of pizza in the United States

Pizza is a big deal in the US, and it has many proud regional iterations. From Chicago deep dish to New York thin crust, this video takes a slice out of US history to focus on this beloved entree. Begin with the documented first incidence of pizza in the US—believed to be by Gennaro Lombardi—and end with how old Pizza Huts are being converted around the country.

Read a complete history of urban mass transit in the United States

Explore the rise and fall of American mass transit, from the horse-drawn omnibus era through the streetcar age to the automobile's dominance. In the 1920s, streetcars carried 12 to 13 billion riders per year. By 1963, that number had shrunken to 300,000.

Listen to a podcast about the eerie side of national parks

Although the National Park System is a relatively recent invention, the lands it includes have been around since the dawn of time and, as a result, have accumulated some interesting folklore. This podcast walks you through some of the best legends about the parks.

A dive into some of the country's stranger Thanksgivings

How did a raccoon intended for the Thanksgiving dinner table end up a beloved presidential pet? History teacher Sharon McMahon’s podcast "Here’s Where It Gets Interesting" takes an episode to delve into some of the more unusual Thanksgivings at the White House, including the Great Cranberry Scare of 1959 and the story of Calvin Coolidge and his "first raccoon," Rebecca.

Explore the technical side of the Erie Canal

Listen to this podcast from Northwestern University exploring the canal’s groundbreaking infrastructure—from locks and aqueducts to its role as America’s first large-scale engineered waterway.

Hear why the IRS has been a frequent victim of arson

This podcast episode takes a lighthearted dive into the history of the IRS, from when the agency was founded and called the Bureau of Internal Revenue, to that one time it had to enforce a national ban on alcohol.

Bitcoin started as a .PDF

Have you ever wondered how bitcoin became, well, bitcoin? In this podcast episode, journalist PJ Vogt dives into what drove the bitcoin hype machine, explaining how it became the phenomenon it is today.

The early years of the Met

The Met didn’t start out in the grand, sprawling grounds that it currently occupies. This episode of Hometown History, a podcast about lesser-known historical places and events, covers the early years of the venerable institution. Learn about how the vision and planning of a group of 19th century artists and philanthropists took the Met from a small collection in a humble brick building to the cultural powerhouse that it is today.

View an historical mural depicting the NSF's impact across seven decades

From 1950 to 2020, the National Science Foundation supported discovery-based, exploratory research that led to numerous breakthroughs, including the development of supercomputing centers, 3D printing technologies, biometric identification systems, an understanding of vector-borne illnesses, a DNA amplification technique, mobile meteorology units, and scientific education and literacy programming.

See 10 of the artifacts on display at the Smithsonian's America at 250 exhibition

From Thomas Jefferson's portable writing desk to a first-generation iPod, the National Museum of American History is showcasing 250 objects across all three floors to mark the 250th anniversary of the Declaration of Independence.

The first comic strip appeared in American newspapers in 1895

This video traces the evolution of the comic book from early newspaper strips to the Golden, Silver, and Modern Ages—highlighting milestones such as the debut of Superman in 1938 and Marvel’s humanized heroes of the 1960s and marking their rise as cultural icons.

The Americans abandoned Philadelphia to the British in 1777

While George Washington's army was encamped in Valley Forge, the British took over the capital of Philadelphia (and the colonies, at the time), including Ben Franklin's house. It wouldn't last long. This is one of a series of podcast episodes exploring the war's battles.

Central banking in the US has had a fraught political history

That history includes its doomed early efforts in the First and Second National Banks, as well as its failure to address the worst financial period in US history, the Great Depression.

Budweiser pioneered refrigerated rail transport for its beer in the 1870s

This enabled Budweiser to achieve national distribution long before competitors, fundamentally transforming the US beer industry. It was also among the earliest large-scale adopters to use pasteurization, allowing it to be shipped long distances without going bad.

The history of Reddit, the front page of the internet

The hyperactive online forum and social media platform has transformed since 2006 from a simple link-sharing site to a behemoth in digital media. Topping off its ascendancy, Reddit went public on the New York Stock Exchange in 2024, solidifying its future amid a shifting technological climate. Dive into Reddit's nearly two decades of growth with this detailed timeline.

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.

Calvin Coolidge brought the State of the Union to the radio age

On Dec. 6, 1923, President Coolidge delivered his Annual Message from the US House chamber as millions listened by radio—crowds gathered outside with amplifiers—making it the first nationally broadcast address and the only in-person State of the Union of his presidency.

The idea for the Federal Reserve was conceived in secret in 1910—with bankers donning duck hunt gear for disguise while traveling to a remote country club on Georgia's Jekyll Island

A century of Billboard issues documenting the evolution of popular music.

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.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

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.

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

Learn more about the history of fireworks, which dates back to an accidental invention during an alchemist's quest for information about immortality.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

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

The 19th-century painters of the Hudson River School were among the first American romantics, with portraits that displayed the natural beauty of the young country.

Listen to an in-depth conversation on the links between Parkinson's disease and herbicide exposure and the challenging pace of scientific investigation.

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

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.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

A researcher recently discovered an interview from 1967 between groundbreaking journalist Joan Didion and the Grateful Dead, years before the band became an institution.

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology