You should get her a Moebius (or Mobius) Ring wedding band. Look it up. Basically its this really cool topological anomaly (technically not an anomaly, but that describes it well). When you take a strip of something and give it a half twist and then connect the two ends to make a ring, it magically has only one side and one edge. Quite a geeky structure if you ask me...
Slashdot Mirror
You should get her a Moebius (or Mobius) Ring wedding band. Look it up. Basically its this really cool topological anomaly (technically not an anomaly, but that describes it well). When you take a strip of something and give it a half twist and then connect the two ends to make a ring, it magically has only one side and one edge. Quite a geeky structure if you ask me...