Quote:
Originally Posted by Diogenes  Not necessary, since I'm not making the wild claim that it's never happened. I freely concede that open water at the North Pole has probably not happened during the nearly 100 years of its recorded history. I do not concede that open water at the pole is unprecedented or disastrous. |
Depends on how far back you go. It is quite unlikly however that the north pole had ever been ice free in the last several mellenia or at least for as long as humans had been roaming the planet - which is the only real relevant time period to us.
So that 65 million years ago Antarctica and the artic were tropical swamps is utterly irrelevant. We don't have giant lizards roaming the planet today.