After he went blind, he committed suicide because he could no longer read.
After he went blind, he committed suicide because he could no longer read. Along with calculating a value for the tilt of the Earth's axis, he made the first map of the world based on longitude and latitude, and discovered a way to separate primes a  nd composites. FTP, name this ancient Greek scientist, the chief librarian at Alexandria who made the first accurate calculation of the Earth's circumference.
After he went blind, he committed suicide because he could no longer read.
Eratosthenes of Cyrene