Finally got some spare time to listen to the show--wow! Great work Fraser and Pamela. I was really excited to hear Pamela say that the observable universe is thought to be three or four percent of the entire universe; it's something I've wondered ever since I 'got' the size and shape of the observable universe and our place in it.

If Pamela says its three or four percent that's good enough for me. Does anyone know *how* we figured out that percentage?

__________________
If something is in me which can be called religious then it is the unbounded admiration for the structure of the world so far as our science can reveal it... of the manifestations of the profoundest reason and the most radiant beauty, which are only accessible to our reason in their most elementary forms...
Albert Einstein