Stonehenge may have functioned as an echo chamber designed to keep ceremonies secret from outsiders.

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...

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.

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 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 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.

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.

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.

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.

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.

BBC Radio 4 tackles the history of Stonehenge

On this podcast, host Greg Jenner humorously unpacks Stonehenge’s biggest myths and mysteries—from what a “henge” actually is, to how alien theories emerged, and why the monument was once sold for just £6,000.

The anechoic chamber at Bell Labs absorbs 99.999% of created sound

The space nearly eliminates sound wave reflection, allowing visitors to become aware of noises created by their own bodies, including their heartbeat and skeletal conduction. Experiments inside have contributed to the development of digital audio and phone touch tones.

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.

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

This short animation shows how human beings managed to lug 30-ton stones over miles of prehistoric English countryside and stand them up The Stone Age engineering involved using giant wooden rollers and carving precisely interlocking tongue-and-groove joints to hold the heavy stones in place.

Hear the story of the police crackdown on a Stonehenge festival in 1985.

This documentary revisits the 1985 police crackdown on a massive free festival at Stonehenge, when the UK government under Margaret Thatcher blocked access and deployed 1,300 riot police—an event that reshaped public access to the site.

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.

BTS' 2026 Seoul concert turned the city into a distributed sound system

The K-pop band's first show after six years turned Gwanghwamun Square into a large open-air venue. Scientists present measured sound levels and noted that the music carried well across vast distances, thanks to good design of the sound system.

Hear what ancient Greek music sounded like

Greek poetry was usually created with the intention that the words would be sung along with music. Evidence and reconstructions of ancient melodies and instruments mean researchers and musicians of today can play music in which the final notes have long since faded.

Modern sound mixing has contributed to audiences needing subtitles

Hidden, high-tech microphones allow actors to speak more softly, rather than yelling to be picked up by a distant boom mic, but this sacrifices clarity. The problem is exacerbated by mixing often prioritizing booming sound effects and soundtracks and audiences listening with small speakers on mobile devices.

Fish populations in the Great Barrier Reef have increased after installing waterproof speakers on the ocean floor that played recordings of sounds from healthy coral reefs.

How does the cocktail party effect work?

In the 1950s, British cognitive scientist Colin Cherry started to explore how we could focus our hearing on one single source, even in a noisy environment. This video animation explains the phenomenon known as the cocktail effect and how selective hearing works. Discover how our brain is on the lookout for important or personally relevant information, even as we are occupied in other discussions.

Foghorn honks helped duckbills set the mood

Examining the unique crest of the Parasaurolophus, which researchers think allowed the creatures to emit loud, unique vocalizations as part of their social interactions.

Studying 'sonic' black holes

If a fish screams as it falls down a cascading waterfall accelerating to ridiculous speeds, will his fish friends above hear him scream? This analogy, odd as it is, has become an essential tool in the astrophysicists kit for learning how enigmatic black holes operate. Lab experiments mirroring the so-called sonic black hole have achieved insights for their cosmic counterparts. Read how it works in this brief piece.

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.

An Aztec skull whistle discovered in the 1990s was mistaken for a toy

In the late 1990s, archaeologists unearthed a sacrificed man clutching two skull-shaped clay whistles at a Mexico City temple to the wind god Ehecatl (eh-HEH-kahtl). Initially dismissed as toys, the instruments produce a scream-like sound that modern brain scans show triggers fear and urgency responses in listeners. This podcast explores the discovery.

Sound can shatter glass if its frequency matches the material's natural vibrations

The sound made by an object when struck is its resonant frequency, which is the sound made when energy is dissipated. Providing energy at that frequency amplifies the vibrations, rather than allowing them to dissipate, which can deteriorate the object's structural integrity.

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people

Hear about the secret room where your rights are decided

A court designed to be the least powerful branch became one of the most influential institutions in history. 1440 Explores host Sony Kassam dives inside the Supreme Court of the United States, with help from Yale law professor Akhil Reed Amar, to uncover how it gained extraordinary authority, what really happens behind closed doors, and why its power has become one of the most fiercely contested questions in modern democracy.

Speleothems are diverse mineral formations that form in air-filled caves

Speleothems like stalactites and stalagmites form when water deposits minerals after a cave rises above the water table and fills with air. These formations preserve the mineral deposits, which may serve as climate proxies, for as long as a million years.

Drum shields help prevent mic bleed and dampen drum sound

Made of plexiglass or acrylic, the shields are commonly seen in churches and live venues to prevent drums from overpowering other instruments, improving the quality of the audio mix.

A Harvard radio station once dedicated 24 hours to Jandek

The enigmatic singer-songwriter plays atonal dirges that are haunting or horrible, depending on your taste. He has self-released over 120 albums but rarely performs live, preferring to conceal his true identity. In 2003, a Harvard radio station aired the "Jandek Orgy," which included his fans debating his identity, lyrics, and philosophy.

The mesmerizing harmonies of Georgia's 'singing village' feast

Listen along to a polyphonic feast in Georgia known as a Supra. The event is a long-held tradition in the "singing village" of Lakushdi, featuring intricate, stunning musical harmonies sung by attendees and performers. Learn how the singing is learned and performed and participate in the feast from afar with this fascinating podcast.

'Be silent, if you choose; but when it is necessary, speak—and speak in such a way that people will remember it.'

- Wolfgang Amadeus Mozart (1756–1791)

Light echoes are expanding shells of reflected starlight

Just as sound waves reveal the location of obstacles by reflecting off them, pulses of light emitted by stars illuminate rings of interstellar dust, giving the appearance of ejected material as the light travels outward.

Machu Picchu explained

High in the Andes Mountains, Machu Picchu stands as a testament to the ingenuity and resilience of the Inca Empire. Constructed in the mid-15th century during Emperor Pachacuti’s reign, this site is believed to have served as a royal retreat or ceremonial center. Its engineering marvels, including sophisticated aqueducts, terraced farming systems, and precisely carved stone structures like the Sun Temple, highlight the advanced skills of the Inca civilization.

How hearing protection became cool

In recent years, the WHO shared research findings that over 1 billion teens and young people face risks of hearing loss due to unsafe listening practices. While earplugs used to hold a reputation for being uncool, this article explores how awareness has led to more people fashioning different types of hearing protection. Explore the growing trend of earplugs at raves, concerts, and other loud events.

An electric pipe organ in Germany is playing a song for 639 years

Created by composer John Cage, the Halberstadt organ first began playing the piece in September 2001, and has since made only nine chord changes. The device within a medieval church utilizes compressed air to play continuous tones. The next chord change is scheduled for August 2026.

Noise pollution from humans and technology alters animal behavior

Animals may experience chronic stress and health issues due to noise pollution, which often interferes with their mating sounds. Due to traffic, nightingales sing louder on weekday mornings, and birds near airports start singing earlier to avoid upticks in takeoffs and landings.

The prophetic Oracle of Delphi held real power in ancient Greece

It was said to have a direct line to Apollo, the Greek god of various domains, including music and prophecy. The oracle was believed to be the most important job in the city and could only be held by women. After years of training, oracles-to-be would be assessed to see if they could become the Pythia—the single oracle who would communicate Apollo's will.

Exposed concrete led to oxygen depletion within Biosphere 2

Instead of being absorbed by plants through photosynthesis to produce oxygen, significant amounts of carbon dioxide were taken up by the calcium hydroxide in the concrete, trapping the oxygen in calcium carbonate and water. This concrete was sealed before the start of the second B2 mission.

The Manhattan Project created secret cities that didn’t appear on maps

To maintain secrecy, the US built three remote research facilities and entire “secret cities” to house thousands of workers and families. These communities—home to tens of thousands—were omitted from official maps until after World War II.

The perception of haunted places is influenced by psychology, setting and suggestion

Gothic architecture and tragic histories contribute to the perception of hauntings. Infrasound and black mold can cause experiences reminiscent of paranormal phenomena. Although paranormal investigators use technology to seek natural explanations, many paranormal experiences remain non-falsifiable.

Robert Fripp manipulated feedback to create his guitar part on David Bowie's 'Heroes'

The King Crimson guitarist placed markings on the studio floor that instructed him where to get the particular sounds he was seeking. Producer Brian Eno then ran the signal through a synthesizer and bent the sound waves with a joystick.

How Stephen Hawking’s voice became iconic

Stephen Hawking relied on a voice synthesizer after losing the ability to speak due to complications with ALS. Despite technological advances, he refused to change the "Perfect Paul" voice, making it a cornerstone of his public identity.

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.

Reports of a recording of Whitman's voice are said to be a hoax

A recording of Whitman reading a portion of his poem "America" has been mass-produced and broadcast, but the Library of Congress and other scholars say the recording is a hoax.

Sleeping on a problem does seem to help—in fact research published in 2026 suggests scientists can seed people's dreams with sound cues about a difficult puzzle during REM sleep and they'll be better able to solve it.

Social media can reinforce echo chambers that amplify pre-existing sentiments

A 2023 Nature study showed that exposure to diverse content left participants with unchanged core beliefs, suggesting social media alone cannot create hateful viewpoints. However, such platforms allow rhetoric to spread widely, potentially exacerbating geopolitical tensions.

Why Henry David Thoreau was not a hermit

When many people think of "Walden," they think of a man who intentionally exiled himself from society. But that's inaccurate. Thoreau regularly welcomed guests and explained that he kept three chairs in his modest cabin: "one for solitude, two for friendship, three for society."

Burning Man's artists and architects create without seeking profit or fame

Each year Burning Man's Black Rock City sees major achievements in design. Many creators remain anonymous and do not seek fame, profit, or acclaim, valuing the process of creating, and seeking to cultivate culture and identity.

The hippocampus, a structure in the brain, plays a crucial role in memory formation

The seahorse-shaped structure transfers short-term memories to long-term storage during sleep. It is located in the temporal lobes, above each ear, and aids in spatial navigation and remembering directions.