Christopher Nolan's film Inception features a classic optical illusion called the Penrose staircase ... cityscapes that fold upon themselves, the movie keeps the audience engaged and continuously ...

Our obsession with stairs and the level of illusion that they create in architecture ... In 1959, Lionel and Roger Penrose, a father and son duo of mathematicians, introduced the two-dimensional ...

There’s no way that’s feasible, right? These familiar steps, called the Penrose stairs, are a type of “impossible object”—a construction that could not exist in reality even though its ...

This tricky visual illusion is also known as a Penrose stair, named after its discoverers, Lionel and Roger Penrose. Hiroyuki Isobe and a team at Tohoku and Tsukuba University (Japan) have now ...