re space spinn offs i just wanted to point out that teflon wasn t from the space program it was from the wwii nuclear weapons development program pipes in the system for fractioning and enriching uranium had to be lined with it uranium hexafloride was the chemical they turned the pitchblend into for enrichment it is massively corrosive even to stainless steels hence the need for a very inert substaance to line the pipes with teflon has all its molecular sockets bound up already so it is very unreactive my sense worth bill
