6 Mar 2010 February 25th ... Mel Acheson claims that during the Ice Age the ice occurred in a ring around the North Pole, quoting Dwardu Cardona and his book, Primordial Star. He correlates such a ring with a ring of aurora. The article doesn't supply any evidence to substantiate this claim or any source that might be checked out - which is unfortunate. Maybe Cardona has references but the thunderbolts article did not.