The earliest record of dream interpretation dates to Ancient Sumer

For most of recorded history dreams were considered divine in origin

The first venture into modern dream interpretation may have been when ancient Greek philosopher Heracleitus proposed dreams were created within the mind. In the late 1800s, the rise of psychoanalysis theorized that dreams content revealed truths about one's psyche, while the invention of the electroencephalogram linked dreams to brain functions.

Dreams have long been used for religious and political power

Classic literature and mythology attests to the crucial role dreams play in narratives, from the Virgin Birth to the prophetic visions of Gilgamesh and Enkidu. The heightened state of dreaming and its analog, hallucinating, have long held special power over the collective imagination.

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.

The oldest recorded ghost drawing comes from ancient Babylon

An ancient Babylonian clay tablet in the British Museum presents a curious image of a ghost being led back to the afterlife. This artifact is believed to be the oldest known drawing of a spirit. According to Dr. Irving Finkel, this image is part of a guide to exorcise ghosts.

Visualizing how we dream via Google search trends

When dreams perplex us, we often want to understand them—and in the age of Google, millions go to its search engine to find answers. Now, researchers have compiled a decade's worth of dream-related queries to glean dream trends across seven languages. See what dream was most commonly searched in Arabic in 2015, or what fears and hopes are specific to one culture and time alone with this unique visual essay.

One researcher posed a theory that aliens played a significant role in human evolution

Researcher Zecharia Sitchin proposed that Sumerian cuneiform tablets revealed that Sumerian gods were aliens who landed on Earth in Mesopotamia and influenced the creation of modern humans. While his ideas gained cultural interest, they are widely rejected by mainstream scholars.

Researchers believe the brain consolidates memories, processes emotions, and plans for the future during dream states

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.

Read the Sumerian poem that provided the recipe for ancient beer

"A Hymn to Ninkasi" is a Sumerian poem from approximately 1800 BCE that's both a tribute to the goddess of beer and a recipe for brewing the beverage.

New Year's Eve celebrations date back to ancient Babylon

Rather than celebrating in winter, the Babylonians honored the vernal equinox, a day in late March with equal amounts of darkness and light that signaled the start of a new year. They celebrated with Akitu, an 11-day festival.

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.

The recorded history of crude oil use, starting with Babylonians waterproofing boats

The ancient civilization located in modern-day Iraq also used crude oil as mortar in construction, while the Egyptians used it to treat human remains during the mummification process. After the invention of the first motorcar in 1885 and the introduction of the affordable Model T in 1908, demand for crude oil skyrocketed.

Archaeologists decode the first known sentence in what may be the oldest written alphabet

This five-minute video details the accidental discovery and subsequent decoding of the first known sentence in what's believed to be the oldest written alphabet. The Canaanite sentence was found on a Bronze Age hair comb unearthed in Tel Lachish, a city of the ancient Biblical Kingdom of Judah, during a dig focused on excavating the kingdom's first Iron Age city. The Canaanite language developed sometime between 3,000 and 1,000 BCE.

The earliest earthquake detection device involved eight ball-wielding dragons

Invented in China in 132 CE, the seismoscope was an urn with dragons facing different directions. If an earthquake occurred, the dragon facing the direction of the tremor released its ball. Like modern seismographs, its mechanism may have involved a suspended weight.

The ancient Greeks and Romans viewed comets and meteors as divine omens

Both considered the appearance of a comet or its fragments as a precursor to significant events, such as the birth of a notable figure or the death of a ruler. One observed in 44 BCE was believed to be a sign of the deification of Julius Caesar after his assassination.

Yoga dates back to about 1500 BCE

The earliest known mention of the word is in the Rig Veda, one of the four canonical Hindu texts. Rishis, or sages, then documented its evolution in the Upanishads, the Hindu scriptures. Much of the modern understanding of Yoga comes from “Yoga Sutras of Patañjali,” which outlines the practice’s eight elements, including physical postures and breathwork.

Brain studies suggest some animals do dream (sort of)

Studies on sleeping cats, rats, fish, and finches show that their brains fire as if performing actions from waking life. Spiders and insects also have REM-like sleep. Whether these findings indicate that animals dream depends on one's definition of dreaming.

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 global practice of public speaking

The epic "Gilgamesh and Aga," which dates back to 1900-1600 BCE, features a speech by the Mesopotamian hero Gilgamesh in which he tries to convince his city's all-male assembly to agree to fight an invading army. Surviving records indicate many ancient cultures, including those in China, India, and North America, had rich public speaking traditions, at least some of which survived time and colonization.

Read the 1963 study testing out an ancient Egyptian pregnancy urine test

The study sought to test out the ancient Egyptian approach of having a woman urinate on barley and wheat seeds to ascertain pregnancy status. Surprisingly, the research concluded that pregnant women's urine did promote growth of cereal grains the majority of the time; nonpregnant women's urine did not. Unfortunately, the sex of the child could not be accurately predicted based on which crop grew.

Ancient Egyptian papyrus from 16th century BCE seems to reference tinnitus

Ancient Egyptians wrote that they treated "bewitched ear" with herbal concoctions that involved frankincense and other ingredients, which were placed in the ear.

How ancient Romans invested and worked

The first stock exchange didn't open for business until the early 1600s, but that didn't stop the Ancient Romans from working and investing their money centuries before. While Romans are better known for their political inventions than their economic ones, understanding how they viewed money can help paint a better picture of the Roman mindset that created systems like democracy. Read this article to learn more.

The lost medieval habit of 'two sleeps'

While most people accept a single seven-to-nine-hour nightly slumber is ideal, the approach is a relatively modern idea. For centuries, interrupted sleep was the norm, with historians uncovering descriptions of two periods of sleep during the normal 24-hour cycle.

Ancient Egypt began as a collection of independent city-states along the Nile

Those cities were gradually organized into Upper and Lower Egypt, names derived from the northern flow of the river. The region was unified for the first time in 3,100 BCE under King Menes (also known as Narmer).

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

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.

The 16th-century astrologer Nostradamus' predictions for 2024

Nostradamus has been credited with predicting several major historical events over the years, but what does he think is in store for 2024? Read up on what his mysterious 1555 book, The Propheties, hints at for the upcoming year.

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

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

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.

The Brothers Grimm were lawyers before they were storytellers, and became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

The first robot in literature may have been a 'mechanical man' in 1907's 'Ozma of Oz,' a book in L Frank Baum's 'Wizard of Oz' series.

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

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.

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.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

A researcher recently discovered an interview from 1967 between groundbreaking journalist Joan Didion and the Grateful Dead, years before the band became an institution.

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

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.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

Browse a detailed visual analysis of over 200,000 similes—comparisons that often use 'like' or 'as'—from popular fiction to see how frequently writers the same idiomatic expressions.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

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

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

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

An initial public offering or 'IPO' is the process of a private company becoming public by putting shares of the company on the stock market for purchase.

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