Science & Discovery in the 10th century

9 sourced entries, 900 CE to 994 CE, oldest first. Also see Science & Discovery across every century or everything else in the 10th century.

• 900The Postclassic Period: The Maya civilization that has flourished for about 650 years in upland areas of what later will be called Central America comes to an end as a result either of depleted agricultural resources or warfare between some 40 rival city-states. The great stone pyramids, ball courts and other structures at cities such as Tikal, Copán, and Palenque are abandoned and overgrown with jungle, as will eventually be the sculpture and relief carvings of the Maya, who have developed a calendar based on almost perfect astronomic measurements. Cities such as Chichen Itza, Mayapan and Uxmal in the highlands of the Yucatán Peninsula will continue to flourish.source
• 909The last Long Count date is inscribed on a monument at the Mayan site of Toniná (modern-day Chiapas, Mexico), marking the end of the Classic Maya Period.source
• 930Yelü Bei, prince and elder brother of the Liao dynasty (Khitan) Emperor Taizong, leaves for China.source
• 946c. November 2 – Super-colossal (VEI-7) 946 AD Eruption of Paektu Mountain on the modern North Korea-China border the eruption was one of the most violent in the past 10,000 years along with KO eruption in 8th Millennium BC, The Crater lake's eruption in 7th Millennium BC, The Kikai caldera's Akahoya eruption in 5th Millennium BC, The Thera or Santorini's eruption in 2nd Millennium BC, The Lake Taupo's Hatepe eruption, The Lake Ilopango's eruption in around 535 and 536, The 1257 eruption of Mount Samalas, The mystery eruption in 1453, and the 1815 Tambora eruption.source
• 964Abd al-Rahman al-Sufi, a Persian astronomer, writes the Book of Fixed Starssource
• 976Zhang Sixun, a Chinese astronomer and engineer, employs the use of liquid mercury, in order that the escapement mechanism of his astronomical clock can function, and metal parts will not rust by using hydraulics (water), or freeze in winter.source
• 989September – Halley's Comet is at perihelion.source
• 993An increase in 14C concentration, recorded in tree rings, as well as 36Cl and 10Be isotopes, recorded in ice cores, suggests that a strong solar storm may have hit the Earth in either 993 or 994.source
• 994An increase in carbon-14 concentration, recorded in tree rings, suggests that a strong solar storm may have hit the Earth in either 993 or 994.source