Here's something to get a broad spectrum of people with Arctic ice on their minds a reason to dance a little jig. Wherever one stands on climate change as a problem, from the likes of the Natural Resources Defense Council on the frantically worried side to the Heartland Institute that worries only about taxes and gov't regs but is smug on climate, this sounds good.
Researchers at the University of Copenhagen reported Friday in Science that, from the evidence on and near Greenland where ice remains thick year around these days and for several millennia into the past, the region was largely ice free annually, for months at a time or longer, 5000 to 8000 years ago. That was during a stretch...