There are over 20,000 trees on the National Mall

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.

Eliza Scidmore advocated for planting cherry trees in Washington, DC, in the early 1900s

The first female writer for National Geographic, Scidmore championed planting Japanese cherry trees around the Tidal Basin in Washington, DC. Her idea succeeded in 1912, after years of lobbying, creating one of the National Mall's most enduring traditions and tourist draws.

The National Mall once had canals and rail lines

In the 1800s, the National Mall looked nothing like it does today. Canals, rail lines, markets, and industrial uses crisscrossed the Mall before later redesigns cleared it into a unified civic landscape.

Take an architectural walking tour of the National Mall

Architect Nicholas Potts leads a walking tour of the National Mall, noting that many buildings adapt European neoclassical styles into an American form, such as replacing traditional motifs with corn cobs on the columns of the US Capitol building.

An inventory of ancient trees in the United Kingdom

The world is filled with trees that are hundreds—if not thousands—of years old, and the UK's Woodland Trust believes each one deserves the same protections great cathedrals and castles receive. This active database invites users to peruse...

The National Parks System includes 63 parks and 400 smaller preserved sites

Want to see how close you are to one of the major preserves or lesser-known historic sites? Explore this interactive map from the National Park Service to plan your next adventure to protected, historic land.

Microforests in urban environments may help combat climate change

Areas of densely packed native trees and drought-tolerant plants within cities can pull carbon dioxide from the air, cool surrounding neighborhoods, and support local wildlife. The idea behind microforests traces back over 50 years to Japanese ecologist Dr. Akira Miyawaki, who promoted planting whole ecosystems to restore degraded land.

See Rockefeller Center's Christmas trees since 1931

In 1931, with construction still underway, Rockefeller Center's very first Christmas tree was erected out front. John D. Rockefeller himself greeted the construction workers who put up the first 20-foot tree and decorated it with cranberries and paper garland.

Sheep once grazed on the National Mall and White House grounds

In the late 1910s, sheep grazed near the Lincoln Memorial and on the White House lawn. Under Woodrow Wilson, their wool was auctioned for charity, briefly making the grazing animals the subject of a federal cost-saving experiment.

Artificial Christmas trees can range from about $85 to $1K or more

In 2022, 22.34 million real Christmas trees were purchased and sold at a median price of $80. Even so, from a price standpoint, a fake tree is usually the less expensive option in the long run, as they're reusable and can save time and maintenance.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

Nearly 99% of the Smithsonian's specimens are hidden in high-security

At the National Museum of Natural History, nearly 99% of its 147 million specimens are stored in secure research collections rather than on display, where they are actively used for scientific work ranging from tracking invasive species to improving aviation safety.

The ‘humongous fungus’ may be the largest organism on Earth at more than 2,300 acres

Discovered in 1988, when it was only covering 400 acres, this massive colony of Armillaria ostoyae, based in Oregon, has taken hold among the tree roots of the Malheur National Forest. It consists of a vast network of unique long black filaments of fungal tissue called rhizomorphs that grow under the soil and infect tree roots, nourishing the fungus but killing the trees. Researchers believe this fungal growth dates back more than 8,000 years and currently weighs approximately 35,000 tons.

Completed in 2017, Apple's headquarters cost $5 billion dollars

Apple Park features a ring-shaped main building that accommodates over 12,000 employees, situated above a two-story underground parking garage equipped with its own traffic light system. Inspired by Stanford University's foliage, Steve Jobs hired one of their arborists to oversee the planting of over 9,000 indigenous trees.

Washington DC's first public library, built in 1903, now operates as an Apple store

The Carnegie Library served as DC's central library until 1972, when overcrowding forced a move to the Martin Luther King Jr. Memorial Library. After sitting unused for five years, the building changed hands several times before Apple agreed to restore it and open a store there in 2016.

Many stories about George Washington are legends without evidence

The famous cherry tree story—where a young Washington admits, "I cannot tell a lie"—was created by biographer Mason Locke Weems. Washington's "wooden teeth" were also a myth: His dentures were made of ivory, metal, and animal teeth.

The Vietnam Women's Memorial was the first monument to American military women on the Mall

Dedicated in 1993, the Vietnam Women's Memorial became the first monument on the National Mall honoring American military women and recognizing the estimated 11,000 women who served in Vietnam.

The expedition documented 240 plant species, 178 new to western science

Lewis and Clark’s botanical records introduced species to Americans like bitterroot, ponderosa pine, and Oregon grape—plants unknown to western science at the time. See a selection of these species in this image gallery.

The complexity of classifying a tree

It may seem obvious to us when we see a tree, but very specific characteristics cause scientists to distinguish trees from other types of plants. This video provides a visual and verbal explanation of distinctions that separate trees from other plants like shrubs or herbs. See a scientific breakdown of these traits.

Dollar stores tend to be smaller in size than other retail stores

A typical Dollar Tree is roughly 8,000 to 12,000 square feet. That's about one-eighteenth of the average Walmart store. Some experts suggest Dollar Tree keeps its stores smaller intentionally, so that customers can see all the products faster, increasing their likelihood of seeing something they want to buy.

The complex science of snow removal

Plowing snow seems simple, but its actually a technically complex task and requires significant logistics, patience, and funding. New York City's 19,000 miles of roads require days to plow at a cost of $12M per inch of fallen snow, and roughly 17 million tons of salt were applied to road surfaces across the US in a recent year. Dive into the details of snow removal with an in-depth and funny video.

Arlington National Cemetery was built on land seized from Robert E. Lee's family during the Civil War

Established in 1864 on a plantation once owned by Lee's wife, Arlington now spans 639 acres and is home to more than 400,000 veterans and their eligible dependents. The cemetery conducts as many as 27 funerals every weekday.

Why giant sequoias need fire to grow

Giant sequoias are the largest trees on Earth, living for upward of 3,000 years—and without fire, they couldn't reproduce. Regular fires help create space in the forest, while its heat opens up the sequoia cones, releasing the seeds onto the newly...

Why bananas are in trouble

The average American eats over 25 pounds of bananas every year, but we won't for long if a deadly soil fungus continues to spread. Learn what scientists are doing to save the popular fruit.

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 best US states for fall apple-picking

Washington, New York, and Pennsylvania are the top states in the US for everything apples, including classic picking at orchards, but also any apple-themed experience, pro-apple policies, and general public interest. Check out the full list here.

The national debt is the total amount the US government owes its creditors

This US Treasury page explains what the national debt is, how it accumulates from annual deficits, and why rising debt can affect interest costs, fiscal flexibility, and long-term economic stability.

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

Before the current East Wing ballroom project, only two White House renovations in the past 100 years cost more than $10M.

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

Between 10 million and 50 million people in the US develop rashes from poison ivy, poison sumac, and poison oak each year.

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

Fireworks-related ER visits are on the rise—in 2024, they increased by 52% as compared to the prior year.

View the ten deadliest tornadoes in US history.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

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.

Bone marrow (soft tissue found inside certain bones) generates roughly 500 billion new blood cells each day

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

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

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

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

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

Dozens of S&P 500 stocks, including Coca-Cola and Walmart—known as the dividend aristocrats—have increased dividends every year for 25 years

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

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

Fish populations in the Great Barrier Reef have increased after installing waterproof speakers on the ocean floor that played recordings of sounds from healthy coral reefs.

Use this calculator to find the dollar value of your mental load, from meal planning to coordinating after-school care for your children.