EI. How to Pass a Cube Through Itself!
We conclude our interview with Dana Richards, editor of Martin Gardner’s Colossal Book of Short Puzzles and Problems pondering how to cut a hole through a cube large enough that another, same-sized cube can pass through!

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strauss said,
August 23, 2008 at 7:14 pm
Here is a nice video on YouTube of a cube passing through a cube of the same size.