Much of the velocity on a home run comes from the pitch (equal and opposite reaction) rather than the bat speed. So it’s not that easy to hit a home run on a 50 mph pitch.
You mentioned the huge number of bovines in the past. I strongly doubt there were anything like the 1.5 billion cows there are now. One reason it’s impossible is that we have literally transformed huge land areas from forests and other types into land for cows. If you don’t get how what I’m saying related that is fine.
Have you ever looked at a pie chart of mammal biomass by species. It goes Humans then cows then everything else is way back. I strongly strongly doubt that big dumb slow cows would be number 2 in biomass absent our loving burgers.
Not sure where you live, but where I’m from, an increase/decrease in home value affects your proportion of the overall property taxes but not the absolute amount. If everyone’s home goes down by 20% then everyone gets same tax bill.
Not sure why you were downvoted. As a Canadian I’ve never heard the expression northern provinces, because that’s nonsense they basically all start at the border.