The reason why this phenomena happens, is because as children, we are noticing everything as a new experience. When we do this, we have more dense or detail-filled memory. As we get older, things become a variation on what we already know to be correct, so we commit less and less to memory and therefore time travels faster in our retrospective experience of it.
So what can we learn from this?
- Always try to keep a sense of discovery.
- Learn new things.
- Do memorable things.