See how the elite warriors of the Aztec Empire trained

Watch a traditional Aztec fire-serpent dance rooted in Mexica mythology

This video captures a performance of a Xicauhuatl—or fire-serpent—dance, rooted in Mexica beliefs that these serpents carried the sun across the sky. The performance highlights the fire serpent’s central role in Aztec ritual and storytelling.

What were the Aztecs really like?

Does the society live up to its blood-thirsty stereotype? Archaeologist Eduardo Matos Moctezuma answers this question and more in this short article. Moctezuma was the principal excavator of the major Aztec archaeological site Templo Mayor in the 1970s. He shares how the culture grew from a combined emphasis on war and agriculture, and ruled one of the world's largest cities at the time.

Human sacrifice reinforced Aztec political control and religious belief

The Aztecs controlled a vast territory through military might and intimidation. One very key tactic of control was the ritual of human sacrifice. While an effective scare tactic, the ritual was also grounded in deeply held beliefs that the world was sustained by blood.

The Aztecs worshipped a vast pantheon of more than 200 gods

This detailed visualization breaks down how Aztec deities were identified through symbolic cues—colors, garments, poses, and objects—each reflecting specific powers and mythologies. It highlights fearsome figures like Tlaltecuhtli, the earth monster depicted with a gaping maw, said to devour the sun each night.

The Aztec Empire began as a three-city military alliance

The Aztec Empire emerged in 1428 when Tenochtitlan, Texcoco, and Tlacopan formed the Triple Alliance, combining military power and tribute networks. This pact transformed the three city-states into a dominant regional empire that rapidly expanded across central Mexico.

Learn to speak the ancient Aztec language Nahuatl

Across the Aztec Empire, you'd be met with variants of Nahuatl, the indigenous language still spoken by approximately 1.5 million people today. This free, self-paced online university course teaches the Veracruz variant, beginning from the language's "piltlahcuiloltzitzin"—or alphabet—to how to conduct specific "tlamachtiliztli" or ceremonies.

See a day in the life of an Aztec midwife

This illustrated story follows Xoquauhtli, a midwife in the Aztec Empire, as she juggles childbirth duties during the festival of Teteoinnan, navigating the tension between professional responsibility and participation in the empire’s religious ceremonies, including ritual sacrifice.

The Aztecs synced their solar calendar with a complex 260-day ritual cycle

Researchers have uncovered how the Aztecs aligned their agricultural solar calendar with a symbolic 260-day ritual calendar, utilizing celestial tracking and monuments. Evidence from ruins and writings explains why their new year corresponded to February 23 on the Gregorian calendar.

How ancient Roman gladiators got ready to rumble

Before they could lay the smackdown in the arena, gladiators were professionally trained, combining a physical regimen with an education in the rules of the ring. Contrary to popular belief, archaeological evidence suggests most gladiators weren't killed in the action, and women may have fought on rare occasions. This article breaks down a life of a Roman gladiator.

Athletes in Mexico are reviving a 3,000-year-old sacred sport

A modern team is working to revive Juego de Pelota, an ancient Mesoamerican team sport played by the Maya, Aztecs, and neighboring cultures. Once central to ritual and community life, the game was outlawed by Spanish conquistadors in the 16th century.

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

The warrior women of Ancient Scythia who inspired the Greek Amazons

Greek literature regales readers with tales of Amazon queens and warriors going toe-to-toe with heroes, including Achilles and Hercules. This article explores why these female warriors were relegated to myth. For a long while, it was believed that these stories about all-female warriors were just stories. But scientists have since found evidence that these ancient warriors were part of the nomadic tribes of Scythia, and more discoveries are expected.

How to carry more than your own bodyweight

Those images showing a villager carrying an enormous bundle on their back, or balancing a basket of fish on their head—how's that possible? This article dives into the clever tools and habits of strength training some cultures employ as part of their labors, from the springy bamboos used by Vietnamese farmers to the headbound burdens of Himalayan sherpas.

See ten of the most amazing Mayan ruins

Hidden beneath the jungles of Mexico’s Yucatán Peninsula, Maya temples, pyramids, and cities reveal the civilization’s vast construction ambitions. Decades of archaeology have uncovered these sites, which are explored in detail in this guided video tour of 10 significant ruins.

The Mexican-American War trained future Civil War generals

Many key military leaders of the Civil War—including Ulysses S. Grant, Robert E. Lee, and Thomas “Stonewall” Jackson—first saw combat in the Mexican-American War, gaining battlefield experience that shaped their later commands.

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.

How fighter jet ejections work

One of the most complex pieces of equipment in a fighter jet is the pilot's ejection apparatus, and the process of ejecting is far more challenging and violent than its depicted in film. This six-minute video breaks down the protocol step-by-step.

Is the Inca maiden the world's best-preserved mummy?

Found atop a snowy peak in the Andes, this teen mummy is at least 500 years old. Watch this four-minute video to see the Inca maiden, a mummy so well-preserved that small details, such as her many braids, are clearly defined.

Watch this how-to video series on how to start strength training

Mayo Clinic put together a collection of videos demonstrating how to get started with strength training, including with exercises like step-ups, abdominal crunches, and more. The Mayo Clinic advises people to try to engage in these exercises working all the major muscles at least twice a week. It also encourages people to inhale and exhale fully between each repetition—inhaling during the less strenuous part of the exercise.

Olympians view sleep as a performance tool, prioritizing routine and environment

Elite athletes emphasize consistent sleep routines, dark and cool environments, the well-placed nap, and tools like eye masks, white noise machines, and supplements like melatonin (particularly for jet lag). This priority belies a core principle: recovery and performance are inseparable. Read more ways Olympians "sleepmaxx" here.

A 15th-century university student documented a surprisingly detailed fitness plan

Modern fitness stems from the revolution in the knowledge we have of the human body, its cardiovascular systems, how muscles work, and more. Nonetheless, people through the centuries have had fitness regimes—including one university student whose fitness plan was preserved in an obscure document found between a manuscript.

The Inca's last stand against the Spanish

The Inca Emperor marched to meet the Spanish, expecting them to surrender. Spoiler: They didn't. Listen to this podcast episode to hear what led up to this moment and what happened next.

The Corps of Discovery braved wildlife, weather, and near-starvation

Along their 8,000-mile trek through territory populated by tribes suspicious of their intentions, Lewis and Clark’s party faced many dangers—including grizzly bear attacks, freezing winters, treacherous river crossings, and periods of near-starvation. Watch a 30-minute elaboration of their heroic efforts here.

Exploring bird skulls

Birds inspire us to fly—but what about bird skulls? This collection of various birds' preserved skulls offers a peculiar "bird's-eye" view. See the many surprising shapes of beaks and eyeholes, from mockingbirds to turkeys, in this fascinating visual collection.

In the 1930s, three Australian soldiers were sent to fight emus with machine guns—and lost

As part of a post-WWI initiative to turn veterans into farmers, soldiers were given plots of land. After emus were found damaging the farmland, three men were sent to handle the flightless birds. These men ended up losing to the second-largest bird species in the world and potentially exacerbating crop losses by sending swaths of the birds running and trampling over wheat.

Aerial footage of five killer whales hunting great white sharks

Killer whales near South Africa have been making a meal of one of the ocean’s apex predators. The unique footage served as the basis of a new scientific paper analyzing the orca behavior.

NBA superstar Victor Wembanyama spent the 2025 summer training with monks in central China to enhance his body and mind.

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.

Watch the cumbersome, but necessary, precautions healthcare workers must take to care for and protect themselves while caring for Ebola patients.

After 25 people used virtual reality headsets to practice flying with virtual wings—flapping their arms—their visual cortex responded to the wings almost as if they were real arms, treating them as body parts.

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

See these 16 pieces of art evoking phobias of snakes, flying, spiders, and more. 

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

Watch how algorithms can be designed to train themselves and self-improve without human input, to the point where the optimized code is too complex for programmers to understand.

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.

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

Explore the known asteroids, comets, and spacecraft involved in asteroid studies within our solar system with 'Eyes on Asteroids,' a 3D visualization from NASA.

Read a deep dive on the 'all-purpose healing' peptide BPC-157.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.

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

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

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.

Brandi Chastain, the star of the 1999 US victory over China in the 1999 Women's World Cup, was a last-second choice to take the penalty kick that sealed the victory.

El Niño, Spanish for 'the boy,' was named after Jesus Christ because the phenomenon resembled the weather changes observed around Christmastime.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

Watch contemporary footage covering the US-backed Shah of Iran fleeing the country in the face of the 1979 Iranian Revolution