99.8 MB (872.5 KB compressed)
5906 x 5906 pixels
50.0 x 50.0 cm ⏐ 19.7 x 19.7 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Penrose stairway. 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 which can be drawn but not created.
Model release not required. Property release not required.