Paul Wagner’s Recent Comments

• Click here to view comment in original post

  Past Warming

  In the Pacific Northwest one finds Douglas-fir trees 600-800 years old at higher elevations than their natural range today.  They date from the medievel warm period.  In Alaska and in some of those Douglas-fir stands are found yellow cedars that are declining or dying because of early soil warming and late frosts.  Many of these trees date from the little ice age.

  Douglas-fir expanded its range when things were warmer and yellow cedar when it was colder.

  Evidence of past fluctuations and current change is very visible if you know what you are looking at.On Yes, the last ice age started thawing over 20,000 years ago, but that stopped a long time ago posted 2 years, 4 months ago 5 Responses

• Click here to view comment in original post

  Greenland and Vikings

  For a more detailed history of Viking settlement in Greenland see the book "Frozen Echo".  Mr. Diamond is rather superficial and does not tell the whole story.  The Vikings left rather than starved and their settlements existed for several hundred years.On 'Greenland used to be green'--Don't judge a book by its cover, much less a land by its name posted 2 years, 4 months ago 23 Responses