Professor Richard Paul
The Division of Science
University of Maine at Machias
Visiting at The University of Montana
 

How Do They Determine That the Earth Has
A Diameter of 7,930 Miles?
 
 

Presentation will give a historical investigation of the various methods used to determine the circumference of the earth.
Is the shape of the earth a sphere, an ellipsoid, or more like a lump of coal and how do we know for sure?