Penrose stairs [SEP] named after
Penrose stairs
The Penrose stairs or Penrose steps, also dubbed the impossible staircase, is an impossible object created by Lionel Penrose and his son Roger Penrose. 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 that a person could climb them forever and never get any higher. This is clearly impossible in three dimensions.
The "continuous staircase" was first presented in an article
the stairs are open to the public. The stairway is claimed to be the longest wooden stairway in the world.
- The longest stone stairs in Japan are the 3,333-steps stairs of the Shakain temple in Yatsushiro, Kumamoto. The second ones, Mount Haguro stone stairs, have 2,446 steps in Tsuruoka, Yamagata.
- The CN Tower's staircase reaches the main deck level after 1,776 steps and the Sky Pod above after 2,579 steps; it is the tallest metal staircase on Earth.
- The Penrose stairs, devised