well, it adds up. say to yourself, if we find an asteroid headed our way, you don't want to deflect it when it's late, then you got to push it really far. you push it and that little bit accumulates. so you can knock it out of harm's way, if you have early enough warning that is up an of the raid poses a risk. >> we got about a minute left. how do i have to be about an asteroid hitting planet earth and how much faith should i be putting in nasa that they can stop it from happening? >> the word isn't fake in this particular context. it's, it's, it's, i mean, it's science. and if we live in a world where