I appreciate that you remain willing to engage in the subject. I’m not a physicist myself but I’ve been exposed to physical science enough to be wary of stateme

I appreciate that you remain willing to engage in the subject. I’m not a physicist myself but I’ve been exposed to physical science enough to be wary of statements like this: > It could cause heavy local damage. But it can't cause global extinction, unless the volume of dirt is the size of a continent. If someone is going to make this claim academically, they will have calculated a whole bunch of things -- with perhaps some assumptions to numbers like mass, volume, velocity of the asteroid so they can play around with them as variables. I will admit I have not dug deeper into this to find the numbers myself and do the relevant calculations. That is, in part, why I choose to be explicit about “theorized”. It’s what might have happened, given what we know, but it’s hard to be sure of what happened unless one studies the relevant ideas.