dude just do a google search, stop talking to monkeys like plunkey and just do your own search. You'll get about 1000% better info and you won't sound like a clueless noob. I managed to access and buy from the silk road just fine without asking anybody from this monkey farm shit, so shouldn't a physicist have no problem with this?
I value Plunky's input on a subject I know very little about, and greatly appreciate his insight. I have no issues whatsoever with people viewing me as a clueless n00b in something wherein I am indeed a clueless n00b.
Scientists tend to collaborate with others who are knowledgeable in areas they are not; those who don't tend to come across as egotistical, self-important idiots.