Aryabhata

Born 476

Died c. 550

Indian mathematician and astronomer

Al-Razi

Born c. 864

Died c. 925

Arab physician and philosopher

Al-Khwarizmi

Born c. 780

Died c. 850

Arab mathematician, astronomer, and geographer

Alhazen

Born 965

Died 1039

Arab mathematician and physicist

Roger Bacon

Born 1213

Died 1292

English philosopher and scientist

"Praise God the creator who has bestowed upon man the power to discover the significance of numbers. Indeed, reflecting that all things which men need require computation, I discovered that all things involve number.… Moreover I discovered all numbers to be so arranged that they proceed from unity up to ten."