Penrose triangle
Oscar Reutersvärd; independently Lionel & Roger Penrose
Three convincing corners. One impossible connection.
Impossible objects / 2012 drawing
Eight sticks become seven
Eight sticks on one side become seven on the other.
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View larger, then trace one connected edge all the way through the object. Compare the local joins with the whole shape.
THE IMAGE IN THIS ARCHIVE
Nevit Dilmen (talk)
Original file & attribution · CC BY-SA 3.0
Original image downloaded from Wikimedia Commons; the downloaded file is unchanged. Gallery previews may be resized or converted to WebP; animated previews show the first frame.
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What is Eight sticks become seven?
Eight sticks on one side become seven on the other.
What should I look for in Eight sticks become seven?
View larger, then trace one connected edge all the way through the object. Compare the local joins with the whole shape.
What explains Eight sticks become seven?
The endpoints imply a different number of solid bars at each side. Edges that begin as boundaries of an object quietly become boundaries of the space between objects.
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Impossible cube
M. C. Escher; modern redraw by 4C and Belbury
A familiar cube frame acquires an impossible set of overlaps.
