Ritual Maya dental ornaments may have prevented tooth decay

Maya jade earflares were believed to open pathways to the divine

Carved from rare, hard-to-work jadeite, Maya earflares symbolized vitality and timelessness. Seen as living objects, they were believed to act as portals between the human and supernatural worlds, making finely crafted examples especially prized.

Enter the Mayan underworld through this 3-mile cave

Discoveries in Belize's Actun Tunichil Muknal (ATM) cave suggest the cave was once a significant site for sacred Mayan ceremonies in antiquity. New research reveals how the Mayans conducted rituals to re-enact a specific creation myth, often staged in desperate times and aimed to invoke the gods for a "rebirth" amid drought and turmoil. Read more on the enigmatic research here.

What ancient goat teeth reveal about ancient human-animal relationships

About 4,000 years ago, several goats with terrible teeth managed to outlive their better-teethed brethren. With such intense dental damage, the goats were likely fed higher-quality feed than the more dentally gifted herd members, a dietary shift that would've contributed to the difference in life span. These goat teeth underscore the hard truth that humans may inflict harm on the animals they care about most, regardless of intention.

The Maya played a ballgame that symbolized the conflict between good and evil

Played on I-shaped courts across Mesoamerica, the Maya ballgame was a ritualized sport tied to cosmic struggle. Contrary to popular belief, the game did not involve mass sacrifice or basketball-style scoring.

The history of skull modification

The ancient Maya people sometimes modified their skulls to appear more conical. Body modification has been a human pastime for literal ages, from piercings to bindings and everything in between. Modifying one's skull shape may have been a way to symbolize status, beauty, belonging, or belief. The health impacts of such practices are still debated. This article explores the history and health impacts of skull modification, also known as artificial cranial deformation.

Vikings had pretty bad teeth

Vikings, the medieval marauders of northern European land and seas, were actually famous for their excellent hygiene. Despite this, evidence from Viking burial grounds points to one exception: their teeth. Roughly 60% of those Vikings studied had at...

A collection of ancient Mayan glyphs and pictographs

The Maya had a syllabic and pictorial writing style that featured many incredibly detailed glyphs. Click here to check out this ancient writing style (and maybe test out their related phonetic sounds).

Who were the mirror-bearers of ancient Mayan civilization?

The Mirror-Bearer is a remarkable example of Early Classic Maya art, one of many discovered that were crafted from solid hardwood around 500 CE. The male figure is adorned in a knee-length woven skirt and shawl and once held a removable plaque, likely a mosaic mirror. It is a model of an actual Mirror-Bearer, likely a royal court dwarf, and depicts typical Maya courtly scenes. Learn more about the sculpture and its inspiration here.

What's so special about Mayan bees and their honey?

Melipona honey was utilized by the ancient Maya and produced by stingless bees located in Mexico's Yucatan peninsula. With a history dating over three millennia, this honey was traditionally used for medicinal purposes due to its high fructose content and antioxidant properties. Unlike regular honey, Melipona honey is less prone to crystallization and has a distinctive watery texture. Learn more about the honey here.

Sugar skulls are more than a sweet snack

The colorful candy combines Indigenous traditions with European confectionery techniques. Its symbolization reminds celebrants that death can be “sweet.”

The medieval meaning of your birthstone

Medieval people viewed birthstones very differently from modern jewelry marketing. Rather than simply being decorative, gems were believed to possess extraordinary magical, medical, and mystical powers. This article breaks down some fascinating insights into medieval gemstone beliefs, including that diamonds could fend off insanity and nightmares.

How dentistry evolved from carnival sideshow to respected medicine

The field, which has remained siloed from other medical care, also has a separate insurance system. This podcast walks through how and why dental insurance often remains capped at $1,500 primarily to cover cleanings, and it wouldn't cover catastrophes—unlike many other medical or housing insurance models.

The benefits of extreme pain rituals, explained

We naturally avoid pain and see it as a negative experience. But many traditional cultures incorporate extremely painful rituals into their religious ceremonies, claiming they, in fact, provide ample benefits. Researchers were able to observe boosts in happiness and a sense of belonging in a tribe of Mauritians after they undertook a rigorously painful religious ritual. Read about the study here.

Why surgeons implant teeth into eyes

What if the thing that restored your vision… was your own tooth? That’s exactly what happened to Brent Chapman. After 20 years without sight, a bizarre surgery using his tooth as a lens restored his vision.

The chemistry of ancient tacos

This 16-minute podcast explores the chemistry of Mesoamerica's corn tortillas, which involve a 3,500-year-old chemical process called nixtamalization that releases vitamins, including niacin, one of the essential B vitamins. This process also makes the tortillas softer and more delicious. Corn tortillas were a staple in Mesoamerica, and the archaeologist interviewed in this podcast argues cultures like the Aztecs and Maya wouldn't have thrived without nixtamalization.

Nail art can be traced back to 5,000 BCE

Archaeologists discovered Egyptian mummies with nail art and henna-tinted fingertips. The trend would continue informally for centuries until Revlon introduced modern nail polish in 1932.

The Ishango bone suggests mathematics was born about 20,000 years ago

Ancient civilizations developed mathematical systems for various purposes, including the Egyptians for the construction of the pyramids and the Ancient Greeks for logical reasoning in theorems. However, these systems were predated by the Ishango bone—found in the Democratic Republic of the Congo—whose notches suggest a base ten system, prime numbers, and simple mathematical operations.

Flossing may lower the risk of strokes

Flossing is known to advance teeth and gum health, but it also betters one’s brain and heart health. According to data from the American Heart Association, taking care of your teeth has cardiovascular benefits. A recent study showed that regular flossers experienced lower risks of strokes, highlighting a link between oral bacteria and stroke risk.

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.

The Indigenous people of the central Californian coast made many advancements

The Indigenous people of the central Californian coast made advancements in basketry, small stone tools, the use of shell beads as currency, and plank canoes for seafaring. In the years before European contact, their numbers reach 25,000 across 150 settlements.

How to conserve a Yup'ik mask

The Met’s YouTube channel is a treasure trove of information about the museum and its collections. In this short video, conservationist Caitlin Mahony works with Yup’ik dancer Chuna McIntyre to understand the significance and proper display of a native Alaskan mask that’s over a century old. McIntyre helps illuminate the stories behind many of the mask’s decorative elements and explains how it would be used in traditional Yup’ik ceremonies.

25 million pounds of beads are distributed every Mardi Gras, leading to environmental concerns

The necklaces—which are mostly made from cheap, often toxic, plastic—are believed to be harmful to New Orleans and its residents. Dr. Howard Mielke, an environmental scientist at Tulane University, found that the majority of lead in the city's soil can be found along Mardi Gras parade routes.

How the environmental diversity of coral reefs provides potential medical treatments for humans

As immobile animals, corals and the organisms that live on them have evolved a suite of chemical compounds to prevent disease and ward off predators they cannot outrun. These include antibiotics, antivirals, and powerful toxins that target the nervous system and are studied for applications involving pain management and neurological treatments.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

Many stories about George Washington are legends without evidence

The famous cherry tree story—where a young Washington admits, "I cannot tell a lie"—was created by biographer Mason Locke Weems. Washington's "wooden teeth" were also a myth: His dentures were made of ivory, metal, and animal teeth.

Baby monkeys chose a soft, warm doll over a wire one with food

Harry Harlow performed controversial experiments with newborn monkeys, separating them from their mothers and letting them bond with stand-in mother figures made from either wire or figures covered in cloth—both with monkey-like faces. The work investigated touch, bonding, and attachment, and found that monkeys overwhelmingly preferred the cloth dolls over the wire ones in various stressful situations.

Artificial coral reefs have been 3D printed from nontoxic, biodegradable terracotta clay, which coral polyps have used as a foundation for rebuilding marine ecosystems.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

Poison ivy is in the same family as mangoes, cashews, and pistachios—and they all produce oily urushiol in their raw, unprocessed state—but they are typically prepared in ways to avoid causing human discomfort.

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

Cultural norms about how to handle the bodies of loved ones in communities in West Africa have hampered Ebola responses.

Fear or disgust related to clusters of holes and cracks, called trypophobia, may stem from evolutionary processes to help us avoid pathogens.

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.

See images of medical cases of firework injuries shared on this 'Instagram for doctors.' (Warning: Graphic content)

Crows are believed to have intelligence on par with a seven-year-old child and demonstrate complex behaviors, from problem-solving with tools to recognizing human faces.

Hookworm infection, though risky, may help fight certain autoimmune conditions by tamping down the immune system's inflammatory response.

Tattoos remain visible on your skin thanks to immune cells called macrophages

Studies suggest when you sleep is as important as how much you get, and syncing with your circadian rhythms may lead to less fatigue and improved long-term health outcomes

Recent research found that the brain doesn't seem to massively rewire following amputation—upending earlier beliefs about the cause of phantom limb pain.

When caught in the mouths of cardinal fish, seed shrimp release glowing, bioluminescent chemicals, which alert predators of the cardinal fish, prompting the shrimp's ejection.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

Scientists can determine Earth's past climate conditions by analyzing air trapped in microscopic bubbles within ice cores—columns of compressed snow layers that build up over hundreds of thousands of years.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

In 1945, Surrealist artist Salvador Dalí and legendary animator Walt Disney began collaborating on a short film that was not completed until 2003, years after both men had died.