Ancient Egyptians developed basin irrigation as an agricultural technique.
Ancient Roman concrete, used in structures like the Pantheon, has proven remarkably durable, in part because lime clasts and reactions with seawater form self-healing mineral phases (Al-tobermorite and phillipsite) that reinforce the material over centuries.
Ancient Egyptian civilization relied on the Nile River's dependable seasonal flooding for agriculture.
Archaeologist Laura Dietrich analyzed more than 8,000 grinding tools from Göbekli Tepe, along with hundreds of stone vessels, including vessels large enough to produce 43 gallons of beer or porridge.
Göbekli Tepe contains huge stone vessels capable of holding more than 40 gallons of liquid.
Construction at Göbekli Tepe began around 9000 B.C., centuries before the first domesticated grains appeared at settlements in the surrounding region.
Ground-penetrating radar and geomagnetic surveys at Göbekli Tepe mapped at least 16 additional buried megalith rings across 22 acres, while the excavated area covers only about one acre, less than 5 percent of the site.
Ancient Egyptians cultivated papyrus as an industrial crop.
Ancient Egyptians are credited as being one of the first groups of people to practice agriculture on a large scale.
The Mesopotamian states of Sumer, Akkad, and Assyria began using arithmetic, algebra, and geometry starting around 3000 BC.
Early Chinese cultures showed astronomical interest, as evidenced by historical records.
The aeolipile is also known as Hero's engine.
Ancient Egyptians grew flax as an industrial crop.
Ancient Egyptians grew wheat and barley as staple food crops.
Ancient Egyptians domesticated corkscrew-horned sheep and depicted them on stone tomb murals of pharaohs.
Archaeologists found three Neolithic human skull fragments at Göbekli Tepe carved with deep, deliberate grooves after death, a form of skull modification not previously recorded in the Neolithic of the region.
Before radiocarbon dating, dating prehistoric objects from before the 6th century B.C. was largely considered educated guesswork.
Ancient Egypt's documented history spans approximately three millennia.
Dramatically lower sea levels during ice ages allow rivers to carve deeper valleys.
Vitruvius described the aeolipile in his work De architectura.
Ancient Egyptians believed coffins could transform the deceased, not just contain them.
Central American cultures showed astronomical interest in early history.
Early mathematics in ancient Mesopotamia, Egypt, and Ebla was used for taxation, commerce, and trade.
Ancient Aliens Season 2, Episode 3, titled 'Underwater Worlds,' features the lost city of Atlantis, ruins beneath Lake Titicaca, and sunken cities where aliens and humans allegedly mixed.
New technology detected dozens of additional wounds on the Jebel Sahaba skeletons beyond the arrowhead impact marks previously identified.
Many sources credit Hero of Alexandria with inventing the aeolipile.
Ancient Egyptian coffins were believed to act as a portal between the worlds of the living and the dead.
One of the Göbekli Tepe skull fragments has a drilled hole, resembling modifications made by the Naga people of India to suspend skulls from strings.
The Beaker folk lived approximately 4,500 years ago across the temperate zones of Europe, during the Late Neolithic–Early Bronze Age.
Honey never spoils; archaeologists have found 3,000-year-old honey in Egyptian tombs that was still perfectly edible.
