>TOR, short for The Onion Router, is an obscure routing network that allows anonymous access to the “darknet” — the vast, murky portion of the Internet that cannot be indexed by standard search engines.
>Estimated to be 5,000 times larger that the “surface” web, it’s in these recesses that you’ll find human-trafficking rings, black market drug markets and terrorist networks.
[edit: To be perfectly clear, I was only highlighting what was actually said. I don't know anything about the dark webs.]