Just as fascinating and probably a tad more entertaining is this optical illusion:
click on the link
The Stoneballs Company blog is a way in which we can share with you a plethora of interesting , unusual (and sometimes mundane but always pertinent) garden tips, facts, objects, stories and anything to do with gardens, landscapes and of course balls which has caught our interest. We hope you share our enthusiasm and interest!
Thursday 22 May 2014
More spherical lore...
It was Isaac Newton who first proposed that Earth was not perfectly round. Instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator and, because of this bulge, the distance from Earth's centre to sea level is roughly 21 kilometres (13 miles) greater at the equator than at the poles.
