The massive gathering that rang in the first Earth Day

Earth Day began as a grassroots protest coordinated by a 25-year-old

With experience as a Vietnam activist and inspired by his upbringing in a polluted mill town, Denis Hayes drew 20 million participants to the first Earth Day after being selected to organize it. The momentum of the event—celebrated across about 10,000 schools and universities—pressured Congress to pass environmental legislation.

Earth Day has become the largest civic event in the world

What began in 1970 with 20 million Americans now involves more than 1 billion participants across over 190 countries each year. Earth Day now encompasses rallies, cleanups, and climate actions worldwide.

Celebrations for America's 150th birthday in 1926 were a poorly organized mess that nearly bankrupted the host city of Philadelphia.

July Fourth wasn't always a holiday, and its meaning has changed over time.

The environmental crises of the late 1960s led to the founding of the EPA

Disasters such as the Cuyahoga River fire and the Santa Barbara oil spill prompted Congress and President Nixon to establish the Environmental Protection Agency in December 1970, with the goal of unifying federal efforts to control pollution.

Hear the story of the early American environmentalists who shaped the public lands we enjoy today.

Hear firsthand accounts from the 1963 March on Washington

This video features stories from people who attended the 1963 March on Washington—the largest demonstration in US history at the time—capturing what it felt like to witness a pivotal moment in the Civil Rights movement as it unfolded.

Environmental regulation had bipartisan support in the 1970s

During the 1970s, Democrats and Republicans alike backed landmark environmental laws. Congress passed the Clean Air, Clean Water, and Endangered Species Acts with overwhelming bipartisan majorities—reflecting broad public agreement on protecting the environment.

Live Aid featured 16 hours of live music across two continents

The 1985 benefit concerts took place in London and Philadelphia, and performances from both locations were televised simultaneously.

Explore the history of Labor Day in the United States.

Watch the full broadcast of humanity's first walk on the moon

On the night of July 20, 1969, Neil Armstrong stepped down the lunar module's ladder onto the moon's surface. The broadcast was watched by an estimated 650 million people—about a fifth of the then global population.

More than 5,000 marchers joined the 1913 Woman Suffrage Parade on the National Mall

On March 3, 1913—the day before Woodrow Wilson's inauguration—suffragists marched through Washington, DC. The parade drew large crowds, exposed violent opposition to women's suffrage, and helped galvanize support for the 19th Amendment.

The Clean Air Act became the cornerstone of modern air pollution control

Passed in 1970 and strengthened through multiple amendments, the Clean Air Act authorizes the EPA to set national air quality standards, regulate industrial and vehicle emissions, and reduce pollutants such as ozone, sulfur dioxide, and lead.

A virtual tour of Philadelphia’s American Revolution Museum

Philadelphia’s Old City hosts one of the largest museums on the American Revolution. This virtual tour allows you to view the museum’s exhibits as if you were there by zooming in on descriptions, browsing images, and learning about artifacts, portraits, and more.

In the early 1900s, Fourth of July celebrations were so dangerous that a reform movement emerged to make them safer.

When police raided New York's Stonewall Inn, a well-known gay bar, in 1969, patrons resisted, leading to 6 nights of protests that would eventually inspire modern Pride celebrations.

Why people hated permanent daylight saving time in 1974

Messing with the amount of daylight each day has consequences, as America found out in 1974 when it first passed all-year daylight saving time. See why it was revoked less than a year later.

The first Macy’s Thanksgiving Day Parade took place in 1924

It was originally intended to promote Macy’s upcoming holiday sales. Although it took place on Thanksgiving Day, the parade was initially called the Macy’s Christmas Parade—the name didn’t change until 1927.

How a crew of hippies and nerdy teens in 1970 launched the global phenomenon of Comic-Con

Brinke Stevens and nearly 50 early organizers recount assembling Comic‑Con in 1970s San Diego—starting with just 300 attendees in a hotel basement—and how that grassroots, inclusive mix of fans sparked an enduring and worldwide pop‑culture movement.

Rachel Carson's 'Silent Spring' exposed the harmful effects of pesticides on food

The 1962 book warned against the use of DDT, a pesticide often sprayed over fields of crops, cautioning that it could be harmful if ingested in excessive amounts by humans. Some credit Carson’s book with inspiring the modern environmental movement and with encouraging the US to establish the Environmental Protection Agency in 1970 and ban the domestic sale of DDT in 1972. (Some readers may experience a paywall.)

The first Boston Marathon was held the next year

In 1897, the manager of the US Olympic team organized the first Boston Marathon, which featured a field of 15 runners. The race took place on Patriots Day, a holiday commemorating the first battles of the American Revolution.

The first US stock exchange dates back to the 1790s in Philadelphia

Only two years after that stock exchange in Philadelphia started, the largest stock exchange in the US to date was created: the New York Stock Exchange.

In 1924, elephants from the Central Park Zoo marched in Macy's inaugural parade

Enormous balloons didn’t make an appearance until 1927, and the parade wasn’t televised until 1948. But no matter the decade, a visit from Santa Claus has always been a highlight.

Watch every episode of David Attenborough's 'Life on Earth' series

A three-year global expedition by Attenborough and his team produced the television series, which debuted in the UK in 1979 and documented over 600 species in 40 countries. The series is estimated to have been seen by over 500 million people in more than 100 territories, including within the US, where is debuted on PBS in 1982.

In July 1979, tens of thousands of people rioted on the Chicago White Sox field during 'Disco Demolition Night,' a promotional event that advertised the public burning of the genre's hit records.

Sri Swami Satchidananda gave the opening remarks at the first Woodstock

The yoga guru was invited to begin the legendary 1969 festival and told the massive crowd he believed music “is a celestial sound and it is the sound that controls the whole universe, not atomic vibrations.” The speech leaned into yoga as a philosophy, one that the many concertgoers in attendance could use to guide their collective desire for peace.

The story of the debut 1967 Consumer Electronics Show

Read an account of the origins of the first CES in New York in 1967, a story which is surprisingly difficult to find information about.

Voyager 1 captured Earth as a 'Pale Blue Dot' from 6 billion kilometers away

On Feb. 14, 1990, NASA's Voyager 1 space probe took the farthest photo of Earth ever captured. Earth appears so small in the image that it takes up less than a single pixel out of 640,000 in the photo's frame.

Burning Man began as a small gathering on a San Francisco beach

Burning man started in 1986 as a gathering for 20 people. In 2023, more than 74,000 attendees became a part of Black Rock City and got caught in the rain.

Watch a 1986 television special about the discovery of the ozone hole

The groundbreaking discovery of the Antarctic ozone hole in the mid-1980s marked a critical turning point, galvanizing international action to address the ozone-depleting properties of chlorofluorocarbons, which had been identified about a decade earlier. This environmental crisis was brought vividly to public attention through media pieces like this one.

Watch a digital archive of David Attenborough's 'Planet Earth' miniseries

Created over five years, the production was the first documentary series to be filmed in high definition and, when released in 2006, the BBC's most expensive nature documentary series. The Emmy Award-winning series featured 11 episodes, each focused on a different Earth biome.

The 2017 Women's March was one of the largest protests in the Mall's history

Held the day after Donald Trump's inauguration, the 2017 Women's March drew an estimated 470,000 to 500,000 people to Washington, DC, and 3 million to 5 million nationwide. It is widely regarded as the largest single-day protest in US history.

The First Continental Congress did not meet to discuss independence from Britain

Coachella is one of the largest music festivals in the world

Coachella is one of the largest music festivals in the US, though it almost didn't make it past its tumultuous first year. This overview explores how that show inspired the first Coachella in 1999, its early setbacks, and how it grew into a cultural mainstay.

Watch a clip from the 1980 NFL Draft, the first to be broadcast on ESPN

ESPN broadcast the 1980 NFL Draft from the New York Sheraton Hotel's grand ballroom. This decision transformed the Draft from a closed, industry-only event into the nationally televised spectacle it is today, drawing over 13 million viewers annually.

Watch the evolution of the NFL Draft

The NFL Draft evolved from a small group of team representatives huddled in a Philadelphia hotel ballroom in 1936 into a three-day primetime spectacle that regularly draws over 500,000 fans and 13 million TV viewers. Explore how it became the event it is today.

Watch a montage of space-based Earth views as astronauts discuss their overview experiences

As of 2023, more than 600 astronauts and 63 space tourists have seen Earth from space, experiencing a life-changing perspective shift as they view the entirety of our home planet.

J.I. Rodale helped pioneer organic farming in the US

Rodale began using the term “organic” in the 1940s to describe farming practices that avoided the use of pesticides and chemicals, which he believed were dangerous. Rodale used a 63-acre farm in Emmaus, Pennsylvania, to cultivate organic food and established a magazine, Organic Farming and Gardening, as well as a foundation based on a simple motto: “Healthy Soil = Healthy Food = Healthy People.”

Watch 5 decades of Times Square ball drops

Dick Clark started hosting his “New Year’s Rockin’ Eve” show in 1972, which has become an annual television staple. This compilation includes five decades' worth of ball drops, allowing you to watch how the tradition subtly evolved.

Burning Man initially started with around 30 people on a San Francisco beach in 1986.

The National Mall hosts one of the country's largest July Fourth fireworks shows

Each Independence Day, the National Mall hosts a massive fireworks display coordinated by the National Park Service, drawing hundreds of thousands of spectators to the nation's capital.

Bill of Rights Day is commemorated annually in the United States on Dec. 15

The date marks the 1791 ratification of the first 10 amendments. President Franklin D. Roosevelt officially established Bill of Rights Day in 1941, on the document's 150th anniversary. Hear the speech he gave on that day.

Philadelphia's Cornbread claims to be the first modern graffiti artist

Darryl McCray began writing his nickname, "Cornbread," across his hometown of Philadelphia in the 1960s. That style was a way of posting a personalized signature across neighborhoods and would become known as "tagging." In time, that style spread to New York, where it took off among other young people.

The Americans abandoned Philadelphia to the British in 1777.

How Pearl Jam helped inspire Coachella

Pearl Jam hasn't yet played Coachella, but they did play a major role in inspiring the annual music festival. The story goes back to 1993, when Pearl Jam was protesting all Ticketmaster-owned venues, which made playing a Los Angeles-area date next to impossible. That led concert promoter Goldenvoice to the Empire Polo Club in Indio, California, where the first Coachella took place six years later.

The 1969 Santa Barbara oil spill galvanized the modern environmental movement

In January 1969, an oil platform off the coast of Santa Barbara ruptured, releasing roughly 3 million gallons of crude into the Pacific. The spill killed over 10,000 seabirds, dolphins, and seals, coating 35 miles of coastline.

Coachella's early years were seen as a success story for alternative culture

From 2007, this oral history of Coachella provides an interesting snapshot of the festival before it became an international attraction. There are interesting stories about the festival's chaotic first year and interviews from artists who frame the festival as a success story for alternative art.

One of the earliest Memorial Day ceremonies was held by newly freed Black Americans in South Carolina

On May 1, 1865, roughly 10,000 people, mostly freed slaves, paraded around a Charleston racetrack where Union prisoners had been buried, predating the first national commemoration at Arlington National Cemetery by three years.

David Attenborough received the 2021 Champions of the Earth Lifetime Achievement Award

The UN's highest environmental honor celebrated Attenborough as "one of the leading voices of the global environmental movement." For at least four decades, he collaborated with the UN Environment Programme by advocating for "efforts to counter the climate crisis, biodiversity loss and pollution" and addressing "world leaders at the UN Climate Change Conference" in 2021.

1985's inaugural Wrestlemania turned pro wrestling into a pop culture phenomenon

WrestleMania I was a major event in the history of pro wrestling, marking WWE’s push to become a global entertainment entity and setting the standard for large-scale pay-per-view events for years to come. It was also a wacky, celebrity-laden affair featuring Cyndi Lauper, Mr. T and Liberace.