Unlike food allergens, encountering inhaled allergens—like pollen—rarely causes life-threatening illness.

This interactive website features nearly 40,000 photos from Wikipedia for you to create visual mosaics with.

Simulations suggest that a paper airplane launched from the International Space Station would maintain its orientation and gradually descend for 3.5 days before chaotically tumbling down and burning up.

Watch Bruce Springsteen's 1985 performance of Woody Guthrie's 'This Land Is Your Land,' which he calls 'the greatest song ever written about America.'

Male pattern baldness accounts for more than 95% of hair loss in men and is characterized by thinning hair, hair loss, and a receding hairline.

The collapse of gas bubbles in the joint synovial fluid causes 'cracking' knuckles.

Watch a two-year time-lapse of a pinecone seed transforming into a pine tree.

Examine this captivating animation 'building' a human—illustrating the roughly 40 weeks of fetal development.

Streaming service Netflix's sound logo 'Tudum' was designed as a key sonic differentiator.

Pregnancy makes someone more attractive to the mosquito species that transmits malaria.

Semaglutides, which belong to a class of drugs called GLP-1s, are prescribed for weight loss in combination with diet and exercise because they trigger the release of the appetite-suppressing hormone incretin.

See a breakdown of how some of the most common food items are traded across the globe, including the key trade relationships for each item.

The final shots of the Civil War were fired in the Arctic over 2 months after the South's surrender.

Explore the known asteroids, comets, and spacecraft involved in asteroid studies within our solar system with 'Eyes on Asteroids,' a 3D visualization from NASA.

The Aztec Empire ruled over 80,000 square miles of central Mexico for nearly a century—until a small band of Spanish conquistadors brought it down in 1521.

The animatronic shark from 'Jaws' was a complex machine called 'Bruce.'

Plato's famous allegory of the cave is a metaphor exploring the value of truth over ignorance.

Light takes approximately eight minutes to travel from the sun's surface to Earth, but it takes thousands of years to reach the star's surface from its core—a distance more than 200 times shorter.

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks.

The US has discontinued a variety of different currency denominations over the years—including a $100K bill.

The average banana produces one positron—the antimatter counterpart to an electron—every 75 minutes as its trace amounts of radioactive potassium decay.

Experience a century of America's healthcare advances with this medical visualization, tracing a sampling of healthcare innovations from head to toe.

Fecal transplants can help treat infections by transplanting healthy gut bacteria from a donor into a patient's gastrointestinal tract using samples of human waste, which are turned into a liquid mixture and often delivered via a colonoscopy procedure.

If a source of music traveled past someone at twice the speed of sound, assuming sufficiently sensitive hearing and powerful equipment, they would hear the music backward.

Explore an interactive timeline of Earth's 4.5-billion-year history to visualize shifting landmasses and oceans, view the locations of significant asteroid impacts, and learn about major geological and biological events.

There are 'YouTube camps' that teach children how to create content for the video platform.

As part of the up to 15 pounds of seafood they consume daily, sea otters eat urchins that feed on kelp forests—sources of shelter and food to over 800 species—thereby making the marine mammal a keystone species.

One of the most famous portraits ever taken is 'Afghan Girl' (1984) by Steve McCurry, yet the subject Sharbat Gula went much of her life without being identified or benefitting from the image's success.

One of the most famous portraits ever taken is "Afghan Girl" by Steve McCurry. Sharbat Gula, the subject of the photo, was not credited until 2002 for her role in the famous National Geographic cover, and continued to live in poverty after the photo was taken.

Explore a collection of famous literary maps, including original images from 'Treasure Island,' 'The Swiss Family Robinson, ' and 'Walden.'

Explore an interactive forecast of the future of the universe, from the return of Halley's Comet to the last light in the cosmos.

There are up to 100 trillion microbes in the gut, and maintaining the relative balance in this ecosystem is important for our health.

Explore how the most commonly used words in the English language have changed from the 1950s to 2023.

Watch footage from the moments the Titanic wreck was discovered by a joint US-French research team in 1985.

'Tulip mania,' the 1630s Dutch craze where rare bulbs were briefly traded like luxury assets, may have been the first financial bubble—and it still shapes markets today.

Joan Didion interviewed The Grateful Dead in 1967, before they became music icons.

A dog's nose can be up to 100,000 times more sensitive than a human's, and each possesses a secondary organ for smelling, which helps learn about other dogs when they sniff each other's butts.

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

The US jobs projected to shrink the fastest over the next decade include typists and word processors.

Emanuel Leutze's painting 'Washington Crossing the Delaware' is one of the defining images of the Revolutionary War.

George Lucas used Joseph Campbell's 'hero's journey,' a narrative structure that encompasses the common characteristics of multiple cultures' mythologies, to revise 'Star Wars.'

See a 3D reconstruction of Tenochtitlan, the Aztec capital