Somehow I doubt a 10 degree shift (F) would eliminate humans altogether, since humans have likely gone through a population bottleneck of 1,000-10,000 breeding

Somehow I doubt a 10 degree shift (F) would eliminate humans altogether, since humans have likely gone through a population bottleneck of 1,000-10,000 breeding pairs: http://en.wikipedia.org/wiki/Toba_catastrophe_theory http://en.wikipedia.org/wiki/Toba_catastrophe_theory