The Biggest Mass Extinction in Millions of Years was Less than 13,000 Years Ago

The biggest mass extinction in at least 3 million years was just over 12,000 years ago... Was it a pole shift?  As Randall Carlson says near the end of this video:

[youtube https://www.youtube.com/watch?v=qigMq3Q475U&w=854&h=480]