30-50 million
As for how long, we had that debate, and your McBullshit was outed as off by a factor of at least 10 fold on every current measure of ice age glacier...
right here...
This is where the climate debate is now stuck. Every piece of land within 600 miles of a pole is in ice age, everything outside of that is not. Nobody has attempted to dispute that. It is the clear truth of Earth today. Milankovitch Cycles, which I call McBullshit Cycles, take a very...
www.usmessageboard.com
For example, your McBullshit argument is that an ice age that began in Northern Canada put 2.5 mile thick glacier on Chicago almost 1000 miles south of where it originated in just 75k years....
First check, what has 2.5 mile thick glacier today = Antarctica. For a quick check of AT LEAST how old those are, check the ice cores... 800k years of them.... 10+ fold off and not even close to the bottom of the glacier...
Your side's claim of 75k years is.... McBullshit