> Unlike other animals, human beings spend a lot of time thinking about what is not going on around them, contemplating events that happened in the past, might

> Unlike other animals, human beings spend a lot of time thinking about what is not going on around them, contemplating events that happened in the past, might happen in the future, or will never happen at all. How do they know what animals think or don't think about? Many, many animals have lots of idle time where they do mostly nothing (not looking for food, or a mate, or anything); why would they not be dreaming or remembering things from the past??