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Source Identification Contest

Now that someone has finally mapped out Tethys, the challenge is this: figure out what I based its shape on. This was attempted for a while on OOC channel, and evidently it's nothing particularly obvious to anyone. For further hints, it is also not anything stupid or ridiculous, and it is something that not everyone knows about.

The contest rules are this: in each round, a given person may make one answer. Add your entries here, to the bottom of this section, and sign them (with ~~~~). A round ends whenever I add a line indicating that none of the above answers are correct, after which everyone may make another answer. The first person to give the correct answer wins a valuable item for the character of his or her choice. Obviously, you may not repeat another person's answer, since if it is correct, they've already won. Let the games begin... —Chaos 11:59, 9 May 2008 (EDT)

My guess is a Moebius strip... Zyll 12:00, 9 May 2008 (EDT)

I was gonna say the infinity symbol, an 8 on its side. Ketsum 12:01, 9 May 2008 (EDT)

I think it is the 3D surface (or brane) of 4 dimensional torus (hypertorus ?) Megnmax

The circumpolar representation of Ursa Major and Ursa Minor..

S the notation for Entropy --Fuego 12:16, 9 May 2008 (EDT)

It's what our Universe looks like -- Hangman 12:15, 9 May 2008