nautil.us
The Shrinking Earth - Issue 1: What Makes You So Special - Nautilus
Click on each date for more information. Sources:3rd century BCE: Eratosthenes measures diameter of Earth http://www.britannica.com/EBchecked/topic/191064/Eratosthenes-of-Cyrenehttp://www.phy6.org/stargaze/Scolumb.htm#q1http://mathdl.maa.org/mathDL/46/?pa=content&sa=viewDocument&nodeId=646&pf=1…