Eratosthenes' measurement of the Earth's circu...
Eratosthenes’ measurement of the Earth’s circumference Ελληνικά: Η μέτρηση της περιφέρειας της γης από τον Ερατοσθένη (Photo credit: Wikipedia)

Eratosthenes (276-194 BCE) was an Ancient Greek who apparently was the first to calculate the circumference of the Earth with remarkable accuracy using math that involved measuring the angles of shadows.

He also invented the idea of longitude and latitude, the leap day, and may have calculated the distance from the earth to the sun.


What are you thinking?

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.