Al-Biruni
An 11th-century polymath who measured the earth, mapped the stars, and documented Indian civilization with breathtaking scientific rigor.
973–1048 (age 75)·Persian scholar and polymath (973–1050)·Birthday: September 4
Biography
In the bustling intellectual centers of Central Asia and Persia, al-Biruni stood as a giant of the Islamic Golden Age. Born in the region of Khwarazm, his life was shaped by political turmoil and travel, which only fueled his insatiable curiosity. He mastered languages, mathematics, astronomy, and history, approaching every subject with a methodology that was startlingly modern. After being taken to Ghazni, he embarked on a defining journey to India, living there for years. The result was his masterpiece, the Tahqiq ma li-l-Hind, a monumental study of Indian philosophy, religion, and science that avoided prejudice and sought understanding. He wasn't just an observer; he was a brilliant experimentalist. He calculated the earth's radius with remarkable accuracy, devised complex astronomical instruments, and argued for the scientific method. His work created bridges between cultures, preserving knowledge and pushing the boundaries of human understanding centuries before the European Renaissance.
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Al-Biruni's Life & Times
The world at every milestone
973Born
978Started school
986Became a teenager
989Could drive
991Could vote
994Turned 21
1003Turned 30
1013Turned 40
1023Turned 50
1033Turned 60
1043Turned 70
1048Died at 75
Key Achievements
- Authored the seminal work Tahqiq ma li-l-Hind (Researches on India), a foundational text of Indology.
- Calculated the radius of the Earth to within 1% of its modern value using trigonometric methods.
- Wrote over 146 treatises across astronomy, mathematics, geography, pharmacology, and history.
- Pioneered the fields of comparative religion and anthropology through his detailed, objective studies of cultures.
Did You Know?
He was fluent in Khwarazmian, Persian, Arabic, Sanskrit, and also studied Greek and Hebrew.
He suggested, centuries before Copernicus, that the Earth might rotate on its axis and revolve around the Sun.
His book on pharmacology, Kitab al-Saydalah, detailed the properties of many drugs and medicines.
He was a contemporary and sometimes correspondent of the philosopher and physician Ibn Sina (Avicenna).
“I serve no master but the evidence, and I write only for the learned.”
