Eratosthenes

Full Name-   

Eratosthenes

Born-

276 B.C

Died-

194 B.C

Famous For-

1. Invented the discipline of geography.
2. Best known for being the first person to calculate the circumference of the Earth.
3. The first to calculate the tilt of the Earth's axis
4. Created the first map of the world
5. In number theory, he introduced the sieve of Eratosthenes, an efficient method of identifying prime numbers.