 And so these places where instead of ice or snow, we have these little pools of meltwater or piles of slush, they're actually potentially going to be experiencing faster melt overall than the climate models are predicting. Right. So it's sort of like a vicious cycle. Slush makes more slush because it all stays kind of warmer. Going back in time now, we have some interesting findings from some ancient Neanderthal remains. Tell me about that.