Where's it all come from?

Just a little philosophical thought... Don't you think it's utterly amazing that everything around us - buildings, computer parts, medicine, clothes, food, books, DVDs - have come from the earth itself? Even things that are manmade have still been made from things that were on Earth in the first place.

Maybe it's obvious to some, but I'd never really thought about where everything has actually come from until recently, then I got quite overwhelmed by that fact!