What do you think caused the end of the ice age?
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It’s starting to look rather obvious that the climate was bought off with large payments of platinum.
If a large comet hit the middle of Canada 12,800 years ago it would have vaporized glaciers miles deep—and molten remnants of the earth below it would have been discharged into the atmosphere—causing fires all over the North American Continent.
This would have caused rapid melting and run off down to the gulf of Mexico and Baja California. If you have ever flown over the desert US you know “something” washed through there not that long ago (geologically.)
People who think all changes are from “slow erosion” are not thinking BIG enough.