Thanks to a discerning reader, a serious correction needs to be made (it
comes of reading graphs upside down!). In the 9th paragraph of my previous
post please change "ice ages" to "inter-glacial warm periods". Otherwise
the sentence is nonsense. My apologies.
Keith
Keith Hudson, Saltford, England
<http://allisstatus.wordpress.com/2010/12/>http://allisstatus.wordpress.com/2010/12/
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