Re 92 and 105: First I just want to reitterate more
generally what 105 said — Milankovitch cycles have had climate signals, in ice ages or otherwise, — well probably ever since the
Moon formed, although the signal from times past will not always reach us, but I've read of evidence of Milankovitch precession cycle forcing of monsoons in lakes in Pangea (PS
over geologic time the periods of some of the Milankovitch cycles have changed as the
Moon recedes from the Earth due to tides).