Six degrees of separation is the theory that anyone on Earth can be connected to any other person on the planet through a chain of acquaintances that has no more than five intermediaries. Six degrees or Six degrees of separation may also refer to: Six degrees of freedom, motion in three-dimensional space, with three translation motions (up/down, left/right, forward/back) and three rotation motions (yaw, pitch, roll) Six Degrees of Kevin Bacon, a trivia game that requires a group of players to connect any film actor to Kevin Bacon in as few links as possible. SixDegrees.
https://en.wikipedia.org/wiki/Six_degrees