
The impossible stairs reduced to its simplest form. Even now it's hard to see what's impossible about it. Father and son L.S. and Roger Penrose were the first to publish its existence in 1958.
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Grace - Tuesday 15 March 2011
Rune - Thursday 17 March 2011
If you are to make an illustration of it, you must make it so that it's only possible to se it from ONE angle! then it is possible to trick the eye.