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"Aromatics do the twist," by David M. Lemal. Nature, 18/25 December 2003.
This article summarizes the work of organic chemists D. Ajami, O. Oeckler, A.Simon, and R. Herges, whose research (published in the same issue, "Synthesisof a Möbius aromatic hydrocarbon," page 819) shows that aromaticmolecules---isolated for the first time---have the topology of a Möbiusstrip.
--- Annette Emerson