Charles H. Ross

“The most important evidence for the age of the maps [...] is to be found in those showing the Antarctic, especially in the maps of Mercator, Piri Re'is, and Oronteus Finaeus. All of these maps appear to show the continent at a time when there was a temperate climate there. Some geological evidence, in the form of three sedimentary cores from the bottom of the Ross Sea, has been presented to suggest that such a warm period may indeed have existed there down to about 6,000 years ago.””