Imagine explaining how you and I are communicating right now, to someone 200 years ago. Smoke signals sure have changed.

I find it all to be so fascinating. Everything, from any time period that people use and enjoy, often taking it all for granted, started out as a crazy idea. I picture the first human stumbling into a forest fire, smelling cooked meat for the first time, having a taste, then failing miserably at getting others to try it. Or the first to sharpen a stick on a rock. Everyone else is wondering why he doesn't just go break one off the tree like they've always done.

Of course, that's science-fiction as well. I wasn't there.