The tilt of the Earth's axis off of the plane of its travel around the sun is currently 23.5 degrees. Scientists have somehow determined that this has varied throughout history from 221 degrees to 24.5 degrees. The greater the tilt, the greater are the temperature swings between seasons here in the Earth's temperate zones.
Looking outside today at sub-zero wind-chill factors, I can't help but suspect that our Earth's tilt may have recently gotten slightly larger. If we go all the way to 24.5 degrees, I think we may be in for another Ice Age ... not too happy a thought.
Perhaps we can convene another Paris Climate Meeting to stop our Earth from tilting any further? Or, that lacking, to increase our production of carbon dioxide to counter this frigid trend? Just thinking out loud ...