For 42 years, Sugihara has worked on devising mathematical formulae to prove the existence of “impossible objects”: 3D recreations of illustrations representing geometric motion that cannot ...

A viral photo of a seemingly impossible object, such as a staircase that appears to endlessly ascend or descend, has baffled viewers. These impossible objects, also known as Penrose stairs ...

This is a Penrose triangle. It is an example of an impossible object or a visual paradox. It appears to depict a contradictory object that cannot exist. Some artists in the 20th century (notably M ...