Another thing that scientists aren’t sure about is dreams. We know that some other animals dream, but there’s no agreed reason for why we dream. Some scientists believe it’s a way for us to make sense of our lives and daily activities. Others believe it’s a “playground” to test different scenarios.
There are also others who believe that our dreams have firm meanings that can tell us more about ourselves. For example, if you dream your teeth fall out, it means you need to tell the truth about something. Dreaming that you’re riding a horse might indicate you’re worried about being too bossy with others.