1000s (decade)

The 1000s was a decade of the Julian Calendar which began on January 1, 1000, and ended on December 31, 1009.

Science and technology

The scientific achievements of the Islamic civilization reach their zenith. Major works from this decade include Ibn al-Haytham (Alhacen)'s Book of Optics, Abu al-Qasim al-Zahrawi (Abulcasis)'s 30-volume medical encyclopedia, the Al-Tasrif.
Other significant contributions to scientific and mathematical understanding were made by Avicenna, who would later publish influential works on medicine, Persian Muslim polymath and scientist Abu Rayhan al-Biruni, Arab Egyptian Muslim mathematician and astronomer Ibn Yunus, Persian Muslim physicist and mathematician Abu Sahl al-Quhi (Kuhi) and Persian Muslim astronomer and mathematician, Abu-Mahmud al-Khujandi.
The Law of sines is discovered by Muslim mathematicians.
Bell foundry is founded in Italy.
Gunpowder is invented in China.