Aufwärtsrollender Doppelkegel

About

Although paradoxical at first sight the riddle can be solved. Two towers, one of which is being thrown down by the ascending bicone (double cone) give a clue to the solution.

Human-made No record of this work says a model made it. What this means.

Archive

Wikimedia Commons, in Wikimedia Commons

Licence or status

CC BY-SA 4.0, as the Wikimedia Commons states it.

Rights statement

Creative Commons Attribution-Share Alike 4.0

Credit

Rhetos

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