I had this thought today after reading about Professor Hawking's recent lecture. If the suppsed Hawking Radiation truly exists then since all matter was supposedly concentrated into a singularity in the time before the big bang (if there was one); then this single black hole must have evaporated away according to the rules that govern Hawking Radiation. To me this seems to say that theoretically there cannot have been both a big bang and Hawking Radiation - one does not exist, but which one? There is a horrifying (if not hilarious) problem here: If Professor Hawking's math is correct (the guy is a brilliant with numbers) then much of 20th century theory must curl up and die! Besides, what happens when a black hole evaporates through HR down to the mass of a proton? We have never observed proton decay, so why should a singularity of same mass as a proton decay by HR?