Monday, August 28, 2023

Mermaid ... She had cosmetic surgery

One dugong to another:
    "I knew her from high school ...
    She must have had cosmetic surgery !"

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Friday, August 18, 2023

Penrose Stairs and Escher's "Ascending and Descending"

Penrose stairs (or Penrose steps) is an impossible object created by Oscar Reutersv√§rd in 1937.  Later, independently discovered and made popular by Lionel Penrose and his son Roger Penrose.

It is a variation on the Penrose Triangle.
Refer to this link:

The "continuous staircase" was first presented in an article that the Penroses wrote in 1959, based on the Penrose Triangle published by Roger Penrose in the British Journal of Psychology in 1958.

M. C. Escher discovered the Penrose stairs in the following year and made his now famous lithograph Klimmen en dalen (Ascending and Descending) in March 1960.

Penrose and Escher were informed of each other's work that same year.

Escher developed the theme further in his print Waterval (Watefall), which appeared in 1961.
Refer to this link:

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Tuesday, August 8, 2023

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