Tweed, the story is nonsense, to say the least. 1. There is no great bone bed or "graveyard" either modern or ancient, for elephants/mastodons anywhere. There has been no great land shift within the history of the mammoth/elephant. I have been a paleontologist in Canada, employed as such there for 30 years, for part of that time involved with Arctic materials. 2. Climatic shifts every few thousands of years (and sometimes more frequently, and with many less important variations) led to the expansion and contraction of grasslands and trees. Mammoths, as John IK has mentioned, migrated with the seasons, much as the bison and caribou in historical time. 3. There is still much grazing land in the Arctic in summer (supporting caribou, etc.) and there has been even more in past episodes. It should also be mentioned that grazing is possible in winter, where snow build-up is slight. Precipitation is low in the Arctic, it just stays around longer. 4. During the last glacial period, both men and mammoths were moved further south. Between the major periods of glaciation, there were warmer periods, when Arctic Canada was essentially ice-free. Similar shifts in climate took place in Siberia, but not necessarily in synchroneity. Animals and man would move with these shifts.