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Re: Another ice age?Posted by DocN on January 20, 2004 at 08:58:41: In Reply to: Re: could global warming just be a cycle? posted by DickT on January 17, 2004 at 16:55:14: There is an interesting article on the belief that we are in a "cool period" on Earth. "We are still in the midst of the third major cooling period that began around 3 million years ago, and its effect can be seen around the world, perhaps even in the development of our own species. Around 2 and a half million years ago, tundra-like conditions took over north-central Europe. Soon thereafter, the once-humid environment of Central China was replaced by harsh continental steppe. And in sub-Saharan Africa, arid and open grasslands expanded, replacing more wooded, wetter environments. Many paleontologists believe that this environmental change is linked to the evolution of humankind." See-- http://www.pbs.org/wgbh/nova/ice/chill.html Doc
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