Researchers generally group gut bacteria into six different categories, with varying amounts of these microbes residing in different parts of the digestive tract.

Computer scientists first started trying to optimize dating using computers in the 1950s.

Relax to a livestream of brown bears chilling in Katmai National Park in Alaska.

Find out how important you are to AI tools when they generate text responses with this tool, which estimates the weights of people's names.

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

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.

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

In 1962, the US detonated a nuclear weapon in space, which produced an electromagnetic pulse that disabled three low Earth orbit satellites and damaged electrical equipment in Hawaii.

Although the moon passes between the sun and Earth each month, its orbit is tilted by five degrees, preventing Earth from experiencing a solar eclipse each month.

Located on Ross Island in Antarctica, Mount Erebus is the southernmost active volcano on Earth and features a lava lake—one of eight known worldwide as of 2026—that erupts regularly.

The Berlin Wall physically separated East and West Berlin for nearly three decades, preventing East Germans from fleeing to the West and earning the nickname 'the Iron Curtain.'

Explore (and debunk) the world's most contagious misconceptions—from the 5-second rule to sugar rushes—on this interactive site. Click on each misconception for further evidence.

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

Play the role of a student as you try to navigate college and remain debt-free.

You may be better at spotting a lie when listening to a speaker's voice inflections rather than watching for facial and body cues.

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.

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.'

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

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

Lesser-known phobias include turophobia, or the fear of cheese, and nomophobia, the fear of being without your cell phone.

Explore how temperatures compare to historical averages in cities worldwide with this interactive global monitor.

Rapid intensification is the increase in a hurricane's sustained wind speed by at least 35 miles per hour within 24 hours, which can strengthen it by up to two categories.

Watch President John F. Kennedy's speech on going to the moon

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

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.

See where your state ranked in an analysis of the best public school systems in the US.

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

Author David Foster Wallace's 'This Is Water' speech provides guidance for adulthood.

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

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

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.

'Golden blood' is the rarest blood type in the world—fewer than 50 people are known to have it.

Between 2002 and 2012, at least 12 people were killed in the Philippines in incidents related to off-key karaoke singing of Frank Sinatra's 'My Way.'

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.

Explore the wineries of Napa Valley with an interactive map of its hundreds of wineries, vineyards, and tasting rooms.

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

Abraham Lincoln had to sneak into Washington, DC, in disguise for his 1861 inauguration after a detective uncovered a plot to assassinate him in Baltimore.

'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.

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.

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