The Strange Drop in American Body Temperatures Over The Past 200 Years
Early last year, researchers in the United States combed Civil War veteran records and national health surveys and found temperatures among men born at the turn of this century were 0.59 degrees Celsius cooler than those men born around two hundred years earlier.
Women, on the other hand, had seen a 0.32 degrees Celsius decline since the 1890s... More here.
Interesting stuff.