We live with 'alien' humans, Vikings and Nazis? Conspiracy theorists claim we have a hollow Earth

Cluff told the Sun: "I don't know how the flat-Earthers can be so confused. They are obviously wrong. The world is not flat – it's hollow." This ancient map shows a supposed entrance to the hollow Earth."

from IBTimes.co.in : Science http://ift.tt/2DdOER6