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Ancient Norse Settlements Hit Cold Spell

A long cooling period may have led to famine in Greenland and Iceland more than 1,000 years ago.

New research reveals just how bad an idea it was to colonize Greenland and Iceland more than a millennium ago: average temperatures in Iceland plummeted nearly 6 degrees Celsius in the century that followed the island's Norse settlement in about A.D. 870, a climate record gleaned from mollusk shells shows.

The record is the most precise year-by-year chronology yet of temperatures experienced by the northern Norse colonies, says William Patterson, an isotope geochemist at the University of Saskatchewan in Saskatoon, Canada, who led the new work. The study will appear online in the Proceedings of the National Academy of Sciences.

Read entire article at Discovery News