So the answer is, not within recorded history.
Recorded "climate" history that is...which hasn't been very long Kirk. There were no scientists during the Paleolithic to tell whether or not the North Pole was Ice Free...
"The climate during the Paleolithic consisted of a set of glacial and interglacial periods in which the climate periodically fluctuated between warm and cool temperatures."
Thos damn cavement, burning their fossil fuels....
http://en.wikipedia.org/wiki/Paleolithic
Last edited: