[blam]

"This guy says the Younger Dryas was caused by a comet impact in North America."

Others have suggested that it was a comet impact that began the end of the Ice Age earlier...reputable scientists at that.

[colorado tanker]

I have a very incomplete understanding of the science of these impacts, but the idea that a large impact triggered the end of the last ice age makes sense to me. Triggering the Dryas seems a little out there, but you never know.