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is it the same thing that has been causing it to melt for the past 12,500 years
Who says it's been melting that long?


It was the end of the last glacial period

The Vikings had cattle farms in Greenland. They raised barley. It is just barely warm enough to do that now, yet the Vikings had several communities there for hundreds of years.

That was just 1000- 1100 years ago

Here is the Ice at 18,000 years ago ..... been melting ever since except for a number of mini ice ages

http://www.bing.com/images/search?q=12%2c500+years+map+end+o...

Bears
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