#2261 - Warren Smith

8311.238 - 8336.606 Dave Smith

It doesn't stop a shift in the change that has always gone up and down throughout recorded history. When we do ice samples, when they do core samples and they go back 10, 15, 20,000, 50,000 years, there's always been enormous shifts in the temperature. Half of North America was covered in a mile-high sheet of ice up until 12,000 years ago. So miles in some places, more than a mile.