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25.0 MB (379.2 KB compressed)
3014 x 2894 pixels
25.4 x 24.4 cm ⏐ 10.0 x 9.6 in (300dpi)
CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Penrose stairs. Computer artwork of Einstein characters climbing a set of Penrose stairs. This is an impossible figure created by the physicist Roger Penrose and used by M C Escher in his illustration Ascending and Descending . The staircase loops back to join itself whilst still appearing to have steps of the same size throughout, all going in one vertical direction. This is an example of an object that can be drawn but not created.
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