I like how the post reflects the excitement of discovering something for yourself, even if only to find out later that it's commonly known in certain domains. Sometimes in this day and age with search engines it seems useless to sit and think about a problem when you can just search and see if and how someone has already solved it.

For me, I like to wonder about the transition point in history where man went from not using numbers to using them. What prompted this? Were numbers used first to indicate order (e.g. my first born son) or quantity? How did someone first teach the idea of numbers to another?

I'm sure there are endless books and articles written on this topic, but I've never had the desire to see what others have to say on the subject. Sometimes it's just nice to let my mind relax and drift to such questions; I sometimes recapture the feeling of wonder and exploration that I had originally...