Why helium helped preserve the US' founding documents, but was later replaced

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

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.

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

Cats have a mutation that prevents them from tasting sweetness, and goldfish rank among the world's supertasters.

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

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.

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

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

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

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

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

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

See a 3D reconstruction of Tenochtitlan, the Aztec capital

Watch an animated visualization of how the Large Hadron Collider works, including how particles are accelerated through a series of machines and how collision data is collected and distributed worldwide.

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

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.

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.

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.'

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.

Explore the history of American restaurants through an archive of menus dating back to the early 1800s.

Watch Dr. Laurence Peter explain his 'Peter Principle,' which states that people are promoted to their level of incompetence and explains why bosses aren't always good at their jobs.

Explore Lewis and Clark's 8,000-mile journey in Google Earth.

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

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.

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.

Sea stars are invertebrates—they lack a backbone—and while most exhibit pentametric radial symmetry due to having five arms radiating from a central disk, some can possess more than 40.

Washing dishware before putting it in a dishwasher may reduce the appliance's effectiveness because it dynamically adjusts wash time and temperature based on a sensor that detects dirtiness.

Listen to audio clips from Hoover, a harbor seal named after its insatiable appetite, who learned to say English phrases such as 'hello there' and 'come over here.'

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

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

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

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.'

Watch the many different civilizations around the Mediterranean shift power from the year 2500 BCE to 0 BCE in this animated map.

Experience 14 billion years of important moments in world history with this scrollable interactive timeline.

Watch 4-plus decades of Pixar's opening logos.

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

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.

The world's largest waterfall is in the ocean and is more than three times the height of Angel Falls, the largest waterfall on land.

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

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.