The flu vaccine has evolved alongside discoveries of new virus strains

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 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.'

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

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

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

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

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

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

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.

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

'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.

Humans tend to imagine aliens as humanlike, but that's probably unlikely. Three different hypothetical planets show how aliens' bodies could take many forms.

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

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

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.

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

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

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

Miracle berries make things that normally taste acidic or sour, such as lemons, taste sweet, like sugar-coated candy, by binding a special protein called miraculin to taste buds.

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

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

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.

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

Watch what would happen if you literally had all the money in the world.

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.

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.

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

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

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

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.'

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.

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.

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

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

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.

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

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

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

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

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.