The Obliquity of te Earth changes between 22 and 24 degrees on a 41,000 year cycle as does te eccentricity of the orbit , at last I have found some reliable sense on this , and rather than reprint it here the link is http://earthobservatory.nasa.gov/Fea...logy_Evidence/ so despite teh Conspiricy mob and teh Prophets of Doom what is happening is natural and Cyliclical