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Subj:    Hypercard Illusion (S459)
          From: Mind Bluff on 12/10/2005
Source: http://mindbluff.com/hyper.htm

Look at the structure below. It's called a hypercard, and it's described in Fractal Music, Hypercards and More... by Martin Gardner. Two different views are presented. Do you think it's possible to create such a structure out of cardboard or paper, simply by cutting with a scissors -- not by using glue or paste? Try doing it. Seems impossible, doesn't it? Well...
It is possible!
As quoted from
Gardner's book:

"Take a rectangular
sheet of paper or
cardboard and make
three cuts along
the black lines
shown to the right.

Now fold flap X
up 90 degrees
along the broken
line ABC and then
turn the lower
portion Y over
by folding it back
180 degrees along
the broken line BC."

Voila -- a hypercard
to put on your desk.