Video Find of the Day
My math research came dangerously close to this sort of thing, but I veered away. This is part 2 of a two-parter. The 1st part explains the whole fundamental domain idea well enough to someone who already understands it. This part, however, has all the cool images that are the real reason mathematicians get off on this stuff. Forget the explanation, get high by your trance-inducing method of choice, and watch space bend.
Not Knot (Part 2/2)