More Prestidigitation

 Circa 1995 (and generally accepted as fact by the scientific community; the fact that the Vikings settled in Greenland in 870 AD, planted crops there, created cemeteries, etc., the fact that the Thames in London repeated froze over in the 16th and 17th centuries).

Circa 2001 (courtesy of the loathsome professor Mann) - no more Medieval warm period and no more little ice age.............And they thought that they could get away with this?