Economics 210b: Topics in Economic History: "Great Books" Course

Live from Global Warming Gehenna: An interesting—and unusual—weather pattern. With more energy the climate can occupy more states, and transfer of cold air straight down the prairie from the arctic to the gulf coast is definitely a state of the system:

Polar Vortex

And: Should-Read: NSIDC: Arctic Sea Ice News and Analysis: "Sea ice data updated daily with one-day lag..."