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Interesting the correlation between CO2 concentration and temperature.
NASA defines the term as a cold period between 1550 AD and 1850 AD and notes three particularly cold intervals: one beginning about 1650, another about 1770, and the last in 1850, each separated by intervals of slight warming
It is widely believed that the low solar activity during the Maunder Minimum and earlier periods may be among the principal causes of the Little Ice Age. Similarly, the Modern Maximum is partly responsible for global warming
However extended solar minimum at the right point in the Milankovitch cycle, would probably do it in my opinion.
Unless of course you believe that humans evolve advanced cultures every 100000 years that are subsequently destroyed leaving no physical evidence of their advancements. Think ill stick with the CO2 rise is natural theory.
Originally posted by Greensage
Another factor is a Pole shift. Upon reading about the Mammoths with their last meals in their mouths I cannot help but realize that a physical pole shift could in fact "flash freeze" a beast in its tracks. I am certain ancient lava flows show magnetic pole shifts but how can we know about the physical poles if they are not experienced by mankind and recorded?
In 1963 Frederick Vine and Drummond Matthews provided a simple explanation by combining the seafloor spreading theory of Harry Hess with the known time scale of reversals: if new sea floor is magnetized in the direction of the field, then it will change its polarity when the field reverses. Thus, sea floor spreading from a central ridge will produce magnetic stripes parallel to the ridge
When one looked at the body one had the impression that it must have suddenly fallen into an unexpected fissure in the ice, which it probably came across in its wanderings, and which may have been covered with a layer of plant-bearing mould.Its death must have occurred very quickly after its fall, for we found
half-chewed food still in its mouth, between the back teeth and on its
tongue, which was in good preservation.
Originally posted by Greensage
reply to post by intergalactic fire
OK, believe what you want by Mad-sci, I highly doubt anyone went back to 1901 to "see the body".
It is funny how we can accept so much in our world but if someone mentions Pole Shift the brain freezes like the New Ice Age; I will keep my mind open, but thanks for the snippet!