A variation on the Penrose triangle, it is a two-dimensional depiction of a staircase in which the stairs make four 90-degree turns as they ascend or descend yet form a continuous loop, so …

May 10, 2022 · In 1959, Lionel and Roger Penrose, a father and son duo of mathematicians, introduced the two-dimensional concept of the Penrose stair. Essentially, the way it reads is …

The Penrose Stairs is an impossible figure (or impossible object or undecidable figure): it depicts an object which could not possibly exist. It is impossible for the Penrose Stairs to exist …

A variation on the Penrose triangle, it is a two-dimensional depiction of a staircase in which the stairs make four 90-degree turns as they ascend or descend yet form a continuous loop, so …

Dec 3, 2025 · An impossible figure in which a stairway in the shape of a square appears to circulate indefinitely while still possessing normal steps (Penrose and Penrose 1958).

Dec 31, 2012 · This rather amazing illusion is called the ‘impossible stairs’ cause it cannot exist in three dimensions or real life. The concept was first presented in an article in 1959, by Lionel …

The Penrose stairs, also known as the impossible staircase or the Penrose steps, is a visual illusion in the form of an impossible object created by the mathematician and physicist Roger …