I was thinking you know hawking radiation where a virtual particle can escape, is it specific as to which particle can escape as in the particle or it's anti particle? does that make a black hole like a particle 'producing' machine, can these escaped particles be a significant fraction of the missing/dark matter, i guess that depends on the number of black holes and how much matter ecapes, (how are the virtual particles treated when it comes accounting for dark matter, is there like a value of mass over a period of time which these virtual particles contribute to? or is it taken as net 0 mass, because they end up cancelling each other out?) whats the rate at which these particles escape? is it known, does it vary for different sized black holes? i guess bigger the black hole the more particles that can escape...because theres more area of the black hole where one of the virtual particles particle can be taken in and one escape. sorry for so many questions, its one of those days. I read The universe in a nutshell by Stephen Hawking, didn't really understand it, got dazzeled by the pictures lol thanks. o plus i was wondering do gravitational waves have a corresponding particle, is it the graviton or is that something else? what about the wavelengh of these waves are they known....are they long wavelengths longer than radiowaves, i heard these waves are weak...as in they dont have much energy so they're wavelengths would be longer. but if the em spec is continuous doesn't that make gravitational waves an extreme form of radiowaves? one more thing...what are those 5 pink boxes at the top of this text box thing next to 'warn (0%)' ?? o erm can i change my username somehow? i don't like it anymore, it's boring.