The earliest earthquake-detection device—the seismoscope—was invented in China in 132 CE and featured eight ball-wielding dragons facing different directions.

Dragon seismometers, Baghdad batteries, and more ancient artifacts

The ancients were behind us in many ways, but some inventions from the time have not been surpassed in the modern era in effectiveness, beauty, or cleverness. This quick list of bizarre ancient inventions includes a battery from Baghdad, a Molotov cocktail-like explosive in Greece, and more.

The dragon has been central to Chinese culture since ancient times

One of the most recognizable symbols in Chinese culture, the dragon is known as a mighty yet often benevolent creature. The dragon is capable of interacting with gods in the heavens; it can turn invisible, shape-shift, and control the weather. These features made the mythological creature hugely significant to the Chinese people because if they could summon dragons, other aspects of their life could improve.

Before alarm clocks, people relied more heavily on their circadian rhythms, humans hired to wake them, and on tools such as candle clocks that dropped pins in metal trays at roughly set intervals.

Rather than predicting them in advance, earthquake early warning systems detect tremors moments after they begin and send notifications that reach users before the seismic activity does.

Scientists determine earthquake locations by comparing how long it takes different seismic waves to be detected at three stations around the world, from which an origin, or hypocenter, can be triangulated.

Thunderquakes—seismic waves created when lightning strikes the ground—have enabled scientists to image underground environments near Earth's surface by detecting vibrations along subterranean fiber-optic cables.

The Four Great Inventions are historically significant Chinese technological advancements

The inventions of paper, gunpowder, printing, and the compass advanced civilizations worldwide by spreading knowledge, enhancing warfare, and improving navigation.

Portugal's 1775 earthquake is considered Europe's first modern natural disaster.

What makes the Earth shake?

Researchers are demystifying the science of earthquakes—from their origins deep within the Earth to the scales that measure their strength. This article, which was part of a series of weekly reports from Cornell University, serves as a guide to...

The history of China: a timeline

How long has China existed, and how and when did it evolve into its form? Explore the journey of China from empire to republic (to a republic, again) in this timeline. Archaeological evidence suggests the earliest Chinese dynasty formed at about...

The earliest record of dream interpretation dates to Ancient Sumer, an analysis of a Sumerian priest king's dream around 2700 BCE.

The Antikythera mechanism: The oldest-known analog computer

A device now considered the world's oldest computer was pulled from a shipwreck more than 120 years ago. Known as the "Antikythera Mechanism," it is now believed to have allowed precise tracking of astronomical positions, and its sophistication overturned understanding of Ancient Greek capabilities.

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.

The frequency of earthquakes and the distribution of their magnitudes have not changed significantly over long-term records, but technological improvements have enabled scientists to detect more of them as they occur.

What (and when) was Imperial China?

China's first dynasty arose in 1600 BCE, according to current archaeological evidence, and its last dynasty fell in 1911. Learn more about Imperial China in this Smithsonian collection of articles and artifacts on each dynasty. According to...

Learn more about the history of fireworks, which date back to an accidental invention during an alchemist's quest for information about immortality.

Some earthquakes can produce smaller tremors called boomerang earthquakes, which travel in the opposite direction and ripple back to the original earthquake's source.

The Ancient Chinese harnessed solar power for heating and cooling 6,000 years ago

Neolithic Chinese homes faced south for winter sun warmth, while overhangs shielded them from high summer sun. These efforts also influenced urban planning, with cities aligning streets east-west for optimal solar exposure.

View the past month of earthquakes worldwide with this digital globe, which displays data from the US Geological Survey.

The legend of the Chinese zodiac involves a race between animals

The legend of the Chinese zodiac says that to help people keep time, the emperor of the gods established a 12-year cycle, with each year symbolized by a different animal. To choose the animals, he held a cross-river race. Each of the winning animals used their unique skills to get across the river: The snake is sneaky, the rabbit is nimble, and the rat is cunning. These characteristics are believed to be mirrored by those born under the animals’ zodiac signs.

China makes 90% of the world's fireworks, with Liuyang as its production capital

Fireworks were invented in China, but their predecessor, the firecracker, was discovered in Liuyang upon burning bamboo. Pyrotechnics have since become part of the city's culture. Liuyang has won many international fireworks display competitions.

Some couples specifically try to birth children in the Year of the Dragon

Dragons are considered so lucky in Chinese culture that it's believed some couples time their children’s births to the Year of the Dragon. That’s debatable. Overall, birth rates in the country have fallen, and it’s not clear if a dragon-baby swell could counteract that.

View a map of the world's major earthquakes from 1956 to 2022, which can be used to identify tectonic plate boundaries.

Because seismic waves travel 100 times faster than tsunami waves—waves typically travel faster through solids than liquids—measurements of geological activity help tsunami detection systems provide early warnings.

12th-century Chinese restaurants followed a rating system

Like a predecessor to today's Michelin stars, restaurants advertised their offerings and skill level based on the number of flags flown outside: a simple, one-dish diner had one; a sit-down restaurant with a proper menu had at least two; three flags was not used for superstitious reasons; four meant the chef had mastered a culinary style; five meant patrons could expect dishes from every region of China.

The first interferometric gravitational wave detector was invented in 1972

Robert Weiss completed the designs after his students asked about an earlier apparatus that used stretched aluminum cylinders to detect passing gravitational waves. Unfamiliar with general relativity and hoping to keep the course focused on experimental tests rather than mathematics, Reiss later asked his students to consider his device for homework. (Some readers may experience a paywall.)

Four astronomical discoveries from ancient Greece

Modern astronomy relies on making discoveries without being present on the planets, stars, galaxies, and other objects studied. Imagine the difficulty the ancient Greeks had studying them without computers and telescopes. Yet somehow they calculated precise measurements of planetary distances, sizes, and more. Read this page to learn more about early triumphs in astronomical science.

The New Year's ball was based on a navigational tool

Robert Wauchope, a member of the Royal Navy, developed the contraption in 1818 so crews could know the time while out at sea. The ball would descend at the same time every day, allowing ships to set their clocks accordingly.

According to the Greek historian Herodotus, the first person to successfully predict a solar eclipse was the Greek philosopher Thales of Miletus in 585 BCE, with the resulting celestial event ending a half-decade-long war.

East Asian records of auroras may date back to 10,000 BCE

Ancient texts from Japan, Babylon, and China contain accounts of auroras dating back millennia. Because auroral activity and intensity are driven by periodic ebbs and flows in solar activity, these records allow scientists to identify patterns that may help anticipate particularly dangerous future solar storms.

Techniques to earthquake-proof a building include the use of counterweights, such as a massive column or pendulum, to dampen the impact of seismic activity and isolating a building's structure from its base.

What did people do before eyeglasses were invented?

An estimated two-thirds of the world's adults use a form of prescription glasses or contacts, proof spectacles were a godsend when they were invented in 1286 CE. But what did people do before that? Different tools were used for distinct vision problems, but some would use magnifying lenses, clear emeralds, and more. Watch this video for a historical explanation.

Ice cream can be traced back to a frozen milk dish from the 7th century.

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.

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.

The world's largest earthquake simulator is an 800-ton shake table facility in Miki, Japan, which was built to test the resilience of structures after the 1995 Kobe earthquake killed over 6,000 people.

The Middle Ages produced inventions that still affect our lives today, like coffee houses and improved agricultural techniques.

A history of China's ancient hidden tombs

Like many ancient cultures, the Chinese had a tradition of burying the dead in elaborate tombs, which would serve as both burial places and residences for the deceased. Archaeological evidence of these tombs, including those of former emperors, provides insights into the country's cultural evolution.

Ancient Chinese marriages began with an elaborate marriage proposal and acceptance between families

The chief objectives of early Chinese marriages involved joining and enhancing the two families and ensuring succession with numerous descendants. Chinese couples still compare astrological signs, although some of the more elaborate rituals of betrothal gifts and sleeping in the “cock loft” are far less common.

Scientists monitor volcanoes with a suitcase-sized observatory called SKATE

Short for Setup for the Kinematic Acquisition of Explosive Eruptions, the device is left to record heat, sound and visual data while volcanologists remain at a safe distance. The $58,000 tool is the successor to the FAMoUS (Fast Multiparametric Setup) prototype.

More than 2,000 years ago, a hand-powered model of the solar system called the Antikythera mechanism—the oldest example of an analog computer—could predict solar eclipses.

Civilizations of the past mistook dinosaur fossils for dead mythological creatures

Without knowledge of evolution or extinction, people believed such fossils were the bones of massive animals no one had ever seen alive, including dragons and giants. It was not until the science of paleontology and studies of extinction that these ideas were overturned definitively.

China has used several different calendars because of changes in government structure

For many centuries, during which China was an imperial nation, the lunar/lunisolar calendar (aka the “rural calendar”) was the basis for organizing the year. Several attempts were made over the decades to switch to the Gregorian calendar—which begins Jan. 1—but it wasn’t until the People’s Republic of China was founded in 1949 that it stuck.

Likened to a car backfiring or a faraway cannon fire, skyquakes have been reported worldwide in Earth's atmosphere without any obvious cause.

Lunar New Year has a rich tradition of visual symbolism

Explore centuries of art related to the holiday—from the dragon robes worn by royalty to the calligraphy symbols thought to bring prosperity and fortune. Ancient artistic practices like woodblock printing, painting, and dance weave together to create the visual language of the Lunar New Year.

Chess traces its roots to chaturanga in sixth-century India

The earliest form of chess, known as chaturanga, emerged in India around the sixth century. The game simulated four divisions of the military—infantry, cavalry, elephants, and chariots—and laid the foundation for modern chess’ structure and strategy.

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.

What did the earliest swords look like?

That depends on where you draw the line between daggers and swords. According to current evidence, the first swords appeared 5,000 years ago in what's now Turkey. Unfortunately, evidence of the earliest swords is colored by survivorship bias; It's...

Earthquakes of identical magnitudes are unlikely to cause equal damage because magnitude only measures energy released, and earthquake severity depends on environmental factors, such as local architecture and geological conditions.

Scientists determined that tectonic plates moved the ocean floor by observing symmetric patterns of magnetic stripes on opposite sides of underwater volcano systems, which could only result from seafloor spreading.