![The Micah Hanks Program show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/041/752/small/the-gralien-report.jpg)
Summary: This week we are joined by Randall Carlson, as we look at the evidence for an impact hypothesis underlying the Younger Dryas, a cold-reversal period that occurred approximately 12,700 years ago.
Summary: This week we are joined by Randall Carlson, as we look at the evidence for an impact hypothesis underlying the Younger Dryas, a cold-reversal period that occurred approximately 12,700 years ago.