Earth Day has become the largest civic event in the world

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.

The massive gathering that rang in the first Earth Day

Earth Day was first celebrated in 1970 and helped inspire a significant nationwide environmental movement. In Philadelphia, the holiday was rung in with a gathering in the city’s Fairmount Park featuring musicians, speakers, and over 10,000 attendees. This video from CBS offers remarkable footage from the day and explains why Philadelphians were especially drawn to the environmental cause.

Burning Man started with 30 people. Now it's a globally recognized festival

Burning Man initially gained momentum thanks to the bohemians of San Francisco's 1980s countercultural scene. Artists and other influential figure helped spread the word to make it one of the largest festivals in the US.

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 EPA partners with other countries to strengthen environmental protection

Through bilateral programs on every continent, the EPA shares American environmental expertise with developing nations and economies in transition. These partnerships support air and water protection, chemical safety, and pollution control, while advancing US environmental priorities abroad.

The marathon is only getting more popular

The marathon has become a part of popular culture, with races in nearly every major city. The largest is the New York City Marathon, which started in 1970. Over 55,000 runners participated in the 2024 race. Its popularity doesn’t appear to be slowing, with younger generations increasingly lacing up their shoes for the race of a lifetime.

Countries that celebrate Easter

Easter is observed as a national holiday in more than 95 countries, with traditions varying wildly—from water fights in Hungary to crime novel reading in Norway—reflecting how thoroughly Christian practice has mixed with local culture.

There have been five mass extinction events in Earth’s history

Each extinction event has resulted in the loss of at least 70% of Earth’s species at the time of the event, often due to significant changes in global temperatures. The most recent event occurred 66 million years ago and wiped out all non-avian dinosaurs.

How humans are engineering the planet

One fact about our time is becoming increasingly well-known. No matter how far you travel, no matter in which direction you point, there is nowhere on Earth that remains free from the traces of human activity.

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.

Bill Nye believes a World War II-level mobilization is needed to end climate change

As part of his science advocacy efforts, Nye has argued that existing technologies, including electric vehicles and renewable energy, can already significantly reduce emissions. However, switching to these technologies requires a more expansive awareness of the problem and a greater sociopolitical willingness by policymakers and the general public.

Thousands of musicians play 'Taps' simultaneously at 3 pm on Memorial Day

Taps Across America launched in 2020 when pandemic closures canceled parades and ceremonies. Tens of thousands of musicians now participate each year, playing the 24-note bugle call from porches and lawns across the country.

The origins of World Laughter Day

Every first Sunday of May worldwide, World Laughter Day is observed, where people gather in public places and laugh. Dr. Madan Kataria developed the ritual based on the facial feedback hypothesis, which posits our facial expressions can affect our mood. The day, first started in 1998 in India, has grown exponentially in recent years. Meet the chortler-in-chief here.

Enough sunlight hits Earth in just 90 minutes to power the planet for an entire year

Despite this, in 2023, only 5.1% of electricity in the US came from solar energy. Solar panel technology has nonetheless made significant advancements since the 19th century, largely due to NASA's efforts in the space race.

The WEF’s Edison Alliance connected more than 1 billion people to digital services

By 2024, the World Economic Forum-backed Edison Alliance had delivered digital connectivity and access to financial, healthcare, and education services to more than 1 billion people, using public-private partnerships across Africa, Asia, Latin America, and the US.

The word 'Earth' comes from the German root word for 'ground'

In English, "Earth" means the planet and the land, but many languages identify each with distinct words. Earth is often given a maternal name or one that identifies it as the land of the living.

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.

Carbon sinks absorb more greenhouse gases than they produce

The largest on Earth are oceans, which capture 25% of all carbon emissions and 90% of excess atmospheric thermal radiation while generating half of the world's oxygen. Wildfires and deforestation have reduced forests' net sink capacity, though fungi are believed to capture and store over a third of global carbon emissions.

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.

More than 130 nations have enacted bans or restrictions on plastic items

Several US states have enacted similar restrictions on plastic bags, straws, food containers, and other single-use plastics, while others have prohibited plastic bans. Despite this, California’s plastic bag ban cut usage by more than 70%, showing the potential of these policies.

How the soccer World Cup works

The World Cup is the biggest game in the world. Watch this video to learn how it works and how it came to be such a massive world event.

Coachella produces around 107 tons of waste per day

Coachella requires a massive infrastructure that powers its soundboards, lighting rigs, dressing rooms, bathrooms, restaurants, and more, creating a significant carbon footprint.

Visualizing the multibillion dollar cost of US weather disasters

The US has sustained 332 weather and climate disasters since 1980 where overall damages/costs reached or exceeded $1B (including CPI adjustment to 2022). The total cost of these 332 events exceeds $2.275T.

Sleep is often viewed individually, when its impact and meaning may be more communal

At any given point, roughly 2 billion people may be asleep on Earth. The typical scientific description of sleep focuses on its individual impact, but the phenomenon shapes whole cultures and eons. This essay prompts a fresh rethinking of the importance of sleep for humanity.

See the average daily volume of data processed by the internet, from emails to Zoom meetings

During February 2025, over 333 billion messages were sent via email every day, or approximately 231,400,000 per minute. Over 150 million hours were spent daily on Zoom meetings worldwide, but almost 10 times that amount of video content was streamed in the same timeframe.

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.

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

The US dollar is the most widely circulated currency in the world, and is involved in nearly 90% of global transactions

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

See the most iconic photos from four decades of LIFE magazine

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.

See the 25 of the best photos of auroras from around the world.

Before writing 'Walden,' transcendentalist Henry David Thoreau nearly burned down his hometown with a campfire that grew out of control.

Scientists testing how climate change affects plants found, in a years-long simulation study, that poison ivy grew 70% faster with the resulting extra carbon dioxide.

The power and influence of the American presidency have expanded significantly over time—far beyond what the founders envisioned.

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

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by more than 1.5 million Muslims each year.

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

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.

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.

Double world record holder Hunter Ewen helped conquer his fear of balloons, called globophobia, by training to win Guinness World Record titles for balloon inflation.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

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

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.

Jimmy Carter signed a 1978 bill that legalized home brewing, a move credited with kick-starting the craft beer industry.

In preparation for this weekend's Eurovision finale, which is something like the World Cup of pop music, here's a young Céline Dion performing (for Switzerland?) at the 1988 competition.

An initial public offering or 'IPO' is the process of a private company becoming public by putting shares of the company on the stock market for purchase.

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people

Studies suggest when you sleep is as important as how much you get, and syncing with your circadian rhythms may lead to less fatigue and improved long-term health outcomes