writer 0 2007-04-17T00:00:00Z The polar bear on its shrinking ice floe has become the urgent icon of global warming and runaway climate change. Even the flat-earther in the White House now concedes that the magnificent bears may be doomed to extinction as the sea ice melts and the Arctic Ocean is transformed into open blue water for the first time in millions of years. Humanity's "great geophysical experiment," as the oceanographer Roger Revelle long ago characterized the steeply rising curve of carbon dioxide emission, has knocked nature off its Holocene foundations in the circumpolar lands. Mike 1016 true 2007-04-17T00:00:00Z Davis 12600 1566 0 1 Denial in the Desert denial-in-the-desert-by-mike-davis Denial in the Desert 2009-09-24T01:33:35Z 388