Among the issues most commonly discussed are individuality, the rights of the individual, the limits of legitimate government, morality, history, economics, government policy, science, business, education, health care, energy, and man-made global warming evaluations. My posts are aimed at thinking, intelligent individuals, whose comments are very welcome.

"No matter how vast your knowledge or how modest, it is your own mind that has to acquire it." Ayn Rand

01 September 2008

The Earth's Favorite Average Temperature

During the last 600 million years, the earth's favorite average temperature has been about 22C or about 72F. The average temperature has come down from this temperature a number of times, but it usually stays near this very warm temperature. When the temperature drops, it for comparatively short times and it sometimes drops a lot. About 600 million years ago, the average temperature was about 23C and it stayed at the high temperature for more than 160 million years. About 440 million years ago, the average temperature dropped to about 12C or about 54F. It quickly rose back up to 23C and then dropped to about 20C from 375 to 310 million years ago. From 300 to about 270 million years ago, it was about 12C again. Then it shot up to about 22C until it dipped down for a short time to about 16C about 140 million years ago. It quickly returned to 22C and stayed there until about 35 million years ago when it started to decrease. Once again, it fell until it reached about 12C. It has since risen a bit, so at this time the average temperature is about 14C, which is much cooler than the most common average temperature of 22C.

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