Stonehenge was built using giant wooden rollers and precisely carved tongue-and-groove joints to lock the stones in place.

New scientific tools, such as radiocarbon dating and DNA analysis, have transformed what we know about who built Stonehenge.

Techniques such as radiocarbon dating, DNA analysis, and isotopic testing have revised scholars' understanding of Stonehenge. This article presents evidence suggesting that societies were more cooperative and less violent than earlier theories had suggested.

Stonehenge has produced wild origin stories

Built before the wheel was invented, Stonehenge inspired increasingly fantastical explanations—from a 12th-century tale of Merlin and Nephilim giants to 1960s claims that aliens built it alongside the pyramids.

Stonehenge was part of a much larger prehistoric landscape

Long before Stonehenge was built, the Salisbury Plain was already dotted with ceremonial sites, burial mounds, and large-scale earthworks. These landscape maps reveal a densely inhabited region shaped by sophisticated prehistoric communities with ambitious public projects.

What Stonehenge sounded like

Researchers built the first scale model of the world's best-known prehistoric stone circle, Stonehenge, to study its acoustic properties. Built approximately 5,000 years ago, the landmark in southern England has puzzled historians for centuries, but...

Stonehenge is one of the world's most studied prehistoric sites and was built around the same time as the Great Pyramid of Egypt.

Stonehenge was part of a continent-wide "henge" boom

While Stonehenge is the most famous, it was one of roughly 1,300 henges built across prehistoric Europe. This piece from the British Museum situates Stonehenge within the broader ceremonial tradition.

Researchers once thought Stonehenge functioned as a precise astronomical computer

In the 1960s, scientists used early computers to analyze the stone layout at Stonehenge, arguing it could predict eclipses and other celestial events. This BBC Sky at Night Magazine piece explains how the theory arose—and why scholars now doubt it.

An artist recreated Stonehenge as a bounce house in 2012

Though Stonehenge is sacred to many modern druids and pagans, artist Jeremy Deller reimagined it as a giant inflatable bouncy house—touring Paris, London’s 2012 Olympics, and even Stonehenge itself.

Take a virtual tour inside Stonehenge

Prehistoric visitors approached Stonehenge along a processional route known as the Avenue, where the sunrise of the summer solstice aligns with the sarsen stones. This interactive 3D tour recreates that experience with explainer videos and detailed sidebars.

A Bronze Age timber circle, nicknamed "Seahenge," discovered on an English beach in 1998, may have been built to trick a bird into staying through winter.

The connection between druids and Stonehenge is a historical misconception.

Fascinating 3D animation shows how Romans built roads

Highly efficient engineering and materials production allowed Roman administrators to lay down nearly 50,000 miles of roads across the ancient empire. These roads were built so effectively that many are still around today. Watch this quick 3-minute video to see how they did it.

The ancient engineers inspiring modern building practices

Modern concrete structures need replacing every 50 to 100 years, so why are buildings by the Maya, ancient Rome, and ancient China still standing strong? This article details how scientists are looking into humanity's past for clues on how to craft long-lasting structures. Part of the problem is adopting old material recipes to hold up to modern demands.

Da Vinci’s ingenious self-supporting bridge

Without using glue or nails, the brilliant polymath Leonardo Da Vinci was able to construct a sturdy bridge of wood logs. This video unpacks the genius civil engineering behind this concept and offers a visual demonstration of how it worked. See how Da Vinci accomplished this feat without using permanent parts, and how his bridge got even stronger as weight and force was added.

Was the stone that sealed Jesus's tomb round or square?

Archaeologist Amos Kloner's survey of more than 900 Second Temple-era burial caves found only four with round, disk-shaped stones—all belonging to the very wealthy. The other 98-plus percent used square, cork-shaped stones, suggesting the popular image of a wheel rolled away from Jesus's tomb is probably a later artistic invention. The Greek verb translated as "rolled" can also mean "moved."

The Greeks weightlifted using massive stones—but viewed muscles differently

Ancient Greek art is replete with humans with muscular physiques, but there is very little evidence they knew much about proper weightlifting. There are just a few stones with inscriptions hinting at their weightlifting use. This article exposes some of our modern assumptions about muscle development, suggesting the Greeks thought differently about strength than we do today.

The canal became the first use of lock-and-lake system at a massive scale

The system centered around Gatun Lake, the largest human-made reservoir at the time, and two massive concrete locks that helped raise the ships 85 feet from sea level to the lake surface. The excavation was also the largest earth-moving project at the time, moving 240 million cubic yards of soil.

The high-tech mechanisms of the Roman Colosseum

The Roman Colosseum is one of the most iconic amphitheaters in the world and still partially stands today. Aside from its sheer size, the arena was equipped with some of the most high-tech engineering from the classical world, including sophisticated lifts, a huge retractable awning, and an underground network of tunnels, elevators, and trapdoors.

The booming fossil industry on the Jurassic Coast

Ever since the Jurassic Coast was registered as a UNESCO World Heritage site in 2001, professional and amateur fossil-finders have increasingly set out for its craggly cliffs to discover ammonites, icthyosaurs, and even new discoveries. This photo essay takes a human look at the growing interest and industry in fossil discoveries along the famed 95-mile strip of England.

Early timekeeping tools included sundials, water clocks, and astrolabes

Astrolabes also provided a person's latitude based on the height of the stars in the sky, thus aiding in navigation. Incense and candle clocks relied on the constant burning rate of fire to track the passage of time based on premarked locations with equal-interval spacing.

Offshore wind turbines are built like giant modular puzzles at sea

Due to their enormous size, turbines are assembled in parts on-site using prefab components, advanced cranes, and vibration-dampening systems to manage the dynamic ocean environment. Three-blade turbines became the norm because even-numbered blades create damaging vibrations.

An exploration of what makes Olympic curling so difficult and strange

The sport is often maligned for its oddity, but this impassioned video argues it's one of the more impressive (and good-natured) sports in the Olympics. Sometimes labeled "chess on ice," curling at the Olympics uses 44-pound, 60-million-year-old granite stones all extracted from the same Scottish island.

An inventory of ancient trees in the United Kingdom

The world is filled with trees that are hundreds—if not thousands—of years old, and the UK's Woodland Trust believes each one deserves the same protections great cathedrals and castles receive. This active database invites users to peruse...

Abbey Road Studios invented stereo recording (and was the site of most of the Beatles' recordings)

Built around 1830 and bought by the Gramophone Company in 1929, the St. John's Wood property became the world's first purpose-built recording studio. Its legacy spans stereo sound's invention, the Beatles' entire catalog, and blockbuster film scores from Star Wars to The Lord of the Rings.

The magic angle to skip a spinning stone is 20 degrees

The traditional shoreside activity—reputedly practiced by luminaries Shakespeare and Homer—can be broken down into its bare physics, from hydrodynamics and momentum to gravity.

How did the Inca build Machu Picchu?

How did the Inca, a people without iron or steel, build a city that has withstood hundreds of years of earthquakes and inclement weather? Machu Picchu stands atop steep landslide prone slopes and active fault lines and gets up to 80 inches of rain...

The origins of the Rolling Stones

Founded by Brian Jones, the Rolling Stones emerged during the massive shifts taking place in the 1960s. From the start, they were the edgier version of the Beatles, and their complex reputation gave them a unique profile in the public eye.

What techniques did cave painters use to create their work?

Cave paintings long predate local craft stores and premade paints, so what techniques and tools did cave artists use to create such long-lasting works? This video gallery details how ancient artists inscribed and painted their work on cave walls, specifically the Chauvet cave in France.

A look at some of the world's most unique churches

From a skeleton-adorned church in the Czech Republic to wooden churches built without nails in Russia, this video explores some of Christianity's most intriguing architectural feats. These places of worship were built in remote areas throughout history, and show amazing innovation. See a fascinating glimpse into the overlooked structures, along with stories of how and why they came to be.

The Royal Game of Ur, which dates back as far as 2600 BCE, is believed to be one of the oldest board games in the world.

Why water towers are built that way

Stacking nucleotide molecules like toy blocks helps build DNA's structure

Each nucleotide is made up of a sugar—deoxyribose—a phosphate group, and one of four bases that contain nitrogen. Like building a two-tone, spiral staircase from the ground up, nucleotides are linked one on top of another so that sugars and phosphates alternate. The twisted strands are held together by hydrogen bonds between base pairs.

An illustrated guide to constructing a Viking ship

Using saga descriptions, museum consultations, and physical evidence, this guide tries to imagine what kind of ship Harald Hardrada would have sailed into Constantinople in 1034. The contemporary illustrations suggest technically precise craftsmanship.

'Staunton design' became the universal chess set in 1849

Introduced in London in 1849, Staunton chess pieces featured simple, uniform shapes that made every piece easy to recognize. Endorsed by champion Howard Staunton, the design quickly became the international standard and remains the only style approved for tournament play.

The White House still has its original stone walls

Construction of the White House began in 1792 and continued even after 1800, when John Adams moved in. Despite being burned by British troops in 1814 and repeatedly renovated since, the White House's original Virginia sandstone walls remain intact.

Why our ancestors didn't have crooked teeth

The ancient human fossil record is filled with specimens with pretty nice teeth. So why do modern humans have dental problems? Scientists can't be certain, but one hypothesis suggests the evolutionary shrinking of the human jaw crowded our mouths,...

England's Stoke-on-Trent was a hub for ceramics

The area of Staffordshire was a major production center for over 300 years, exporting pottery from brands like Wedgwood across the globe.

Watch a time-lapse of the installation of the New Safe Confinement structure

The world's largest movable metal structure was built to contain the radioactive material from the 1986 Chernobyl disaster, which had previously been confined within a structure built to last no more than 30 years. The new structure was slowly rolled along rails over the course of two weeks.

Greek-Egyptian scientist Heron invented automatic doors for a temple

The doors opened when a fire was lit in front of the temple, causing heat and pressure to build in a nearby vessel that would force its contents into a higher secondary vessel. This secondary vessel would lower, pulling the doors open. When the fire extinguished, the pressure and liquid in the vessel would reverse course, closing the temple doors.

Gastroliths, or ‘stomach stones,’ help animals digest plants in their stomachs

Most often used by birds and reptiles, gastroliths help break down the cellulose of plant cells, which can resist decomposition from stomach acid alone. Over time, gastroliths become smooth and are regurgitated before being replaced by larger stones.

How William the Conqueror expanded into England

It took William "the Bastard," the king of Normandy across the English Channel from England, over two decades so solidify control of the land he famously conquered in 1066. This video explores the audacious, risky history of the Norman king's move, focusing on the role the Bayeux Tapestry played as propaganda for the famous conqueror.

For 'Labyrinth,' the Jim Henson Company erected a 15-foot-tall character named Humongous, the largest puppet the company had ever built.

Linguists proved Shakespeare wrote his plays

In the 1800s, linguist Wincenty Lutoslawski invented a method of linguistics analysis called stylometry to help certify literary authorship. Stylometrists concluded that Shakespeare wrote his plays, and likely collaborated with Christopher Marlowe for some.

See how the Winter X Games course is built

Winter X Games courses are custom-built over weeks, with crews moving thousands of tons of snow to create features like halfpipes and jumps—incorporating athlete input to ensure challenging designs that push progression and safety.

Learn how the Earth was made

Four and a half billion years ago the Earth formed from dust in space to become a molten ball of rock orbiting the sun. Travel back in time to investigate how the Earth was made.

Anglo-Saxons toasted the new year

The lord of a manor toasted his subjects at the start of a new year with the Old English phrase “waes hael,” which roughly translates to “be well.” “Wassailing” involved traveling from house to house, singing songs, and continuing to drink, a practice that eventually influenced caroling.

Why roller coaster loops are never circular

The beloved looped roller coaster rides used to be shapes as perfect circles and constructed with wood, resulting in wobbly machinery that gave people whiplash. After the invention of steel and further scientific understanding, Six Flags debuted The Great American Revolution—a modern, oval loop with steel that offered a safer and smoother experience.

The construction of LIGO needed to compensate for Earth's curvature

Across the 4-kilometer (2.5-mile) arms, the height of Earth's surface falls by almost a meter, preventing the lasers traveling within the arms from meeting the mirror at the end of each. Concrete slabs built beneath the arms help keep them level and provide structural support against seismic vibrations.

A primer on reading the rock layers of roadcuts

Road construction often requires cutting through layers of rocks, coincidentally exposing millions of years of rock formation. This simple guide introduces basic rock types, what causes curves and folds, and the major rock formations in regions around the US.

Viking established entry, descent, and landing methods for future planetary visits

The most significant engineering challenge was slowing the Viking lander, which would move through space at nearly 29,000 kilometers per hour before reaching Mars. This required the invention of supersonic parachute technology, which is still used today.