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

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

Use this tool to calculate the dollar value of your parental mental load, from meal planning to coordinating after-school care, then see resources that help generate solutions.

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

Watch a breakdown of the canine family tree that explains how foxes and wolves are related to our beloved household pets, like poodles and dachshunds.

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

Give your memories a place to live and explore the personal stories left by strangers, tied to specific locations, in this interactive map of the world.

Explore 3D models of some of the most dangerous viruses, allowing us to understand these and other pathogens in new ways.

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

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

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.

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

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

Explore a detailed map of Odysseus' fictional journey from 'The Odyssey.'

The tallest tsunami in recorded history was 524 meters (1,720 feet) high—taller than the Empire State Building—and occurred in Lituya Bay, Alaska, in 1958 after an earthquake dislodged a rockface into the water.

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

Metamorphosis evolved over millions of years as species that hatched as smaller versions of adults started exhibiting genetic mutations that differentiated juvenile and adult bodies.

On planets in systems with two stars, such as the fictional Tatooine from 'Star Wars,' observers would see overlapping rainbows and double rainbows.

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.

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

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

Explore the 2025 Uber Lost & Found Index to find out the weirdest items that passengers left behind in Ubers last year, from ten live lobsters to a mannequin head with human hair.

Lake Sørvágsvatn sits about 32 meters (105 feet) above sea level, but the taller surrounding cliffs create an optical illusion that makes it appear to float much higher above the ocean.

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

Check out some of the best books that can be read in a single day, with titles from Han Kang, Denis Johnson, Muriel Spark, and more.

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.

On a cruise ship, the average person uses about 50 gallons of water a day, which is treated by bacteria and onboard filtration systems, then stored until the ship can legally discharge the wastewater.

Here are some tips from Pew Research to help you distinguish between a good poll and an unreliable one.

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.

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.

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

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

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

If the moon were less than one-twelfth its current distance from Earth, the planet's tidal forces would overcome the moon's internal gravity, tearing it apart and forming a ring of debris.

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.

Peek into the love lives of thousands of strangers whom Stanford University researchers have been tracking since 2017 on this interactive page.

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

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

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.'