The weather forecast for today shows a forty degree drop over the course of the day. That’s nuts, but Saturday’s forecast low is even crazier. 65° to 17° in 24 hours? (In Celsius, that’s 18° to -8°) The snow from Sunday’s big snowstorm has pretty much melted away just in time for more winter.

Temperature extremes like this make me think of the expansion of railroad rails in heat, and, for whatever reason, an algebra problem from my first math class in college. Oh, and the temperature of the Moon ranges about 500° F during a Lunar day, I never realized how hot it got there, though it would only affect your feet since there’s no atmosphere.