00:51. Also, why are we talking talking about the lean animals we see today we say that a deer doesn't have all that much fat of course omitting all that fat taking all that fat out of the abdomen.  But these are not the types of animals that are ancestors would have eaten historically.  We were eating megafauna.  We were eating mammoth. We were eating whales.  We were eating giant bears and giant and these other sorts of animals that had a very high proportion of fat to their body weight.