[CliffStoll]

Funny you should mention it, Nail of the Earth. My friend Guy Consolmagno (oh, the stories I could tell - we were in grad school together, and he became the director of the Vatican Observatory) is taking one of my Klein bottles to Pope Leo next week. Yikes! -Cliff

[nhecker]

Wow, what an incredible gift (and privilege) that will be! Receiving a box with a few Klein bottles from you has still been the best thing I've ever gotten in the mail. I just earlier today used a Möbius strip to explain the bottle on my desk to my elementary-school-aged son. Thank you for being such an inspiration (and excuse to teach and learn) to us all, young & old alike.

_nick