Originally Posted by DOCTOR 30

http://www.world-mysteries.com/sar_1.htm

Okay, here's one for you big brain Brad's out there.

It's about a map, drawn up 300 years ago that shows
the outline of Antarctica.

Problem is how did someone 300 years ago know exactly
what the coastline of Antarctica looked like without the ice
on it when science says ice has been covering it for millions
of years?

Even naval analysis concluded as well as recent satellite
subsurface imaging that the map is accurate.

Any guesses?