"moose roamed the North Slope, about 3,000 years ago" 

I find that paraphrased statement and others regarding the historical environment quite interesting.  Most people will never give it a thought or that according to the USGS, "horses and bison persisted on the North Slope until at least 12,500 years ago".

Why is this interesting?  Because there had to be a climate which allowed the feed for these animals to grow 12,000 years ago!  Incidental evidence which shows to fanatics that the climate has changed before, without man's interference.  The same fanatics who have a mistaken impression that 'man' is in charge of this world.  Certainly on a limited basis, man's activities have an effect but in the big picture, the picture which includes the reality of our existence, man is no more than an annoying flea biting on the ass of an elephant.  Oh the elephant will scratch the bite by rubbing on a tree, but it will survive.  The flea however, might not!  That is reality.