[njharman]

The ancient greeks, among others, had that knowledge.

What makes no sense is the perpetuation of the myth that spherical earth is "new" concept.

The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC -- http://en.wikipedia.org/wiki/Spherical_Earth

http://scienceblogs.com/startswithabang/2011/09/21/who-disco...