 And this all seems, you know, when you think about it, this all has all kinds of implications. But it shouldn't be a big surprise. Our brains, like other animal brains, have developed in ways that have become extremely finely tuned to the natural environment and the situations that we would naturally be dealing with day to day, not just now but back into the very distant past. Often this is to be alert to potential dangers, but in the case of humans, there's also the fact that communication among persons has been crucial to our development.