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  2. Every Kid Outdoors - Wikipedia

    en.wikipedia.org/wiki/Every_Kid_Outdoors

    Every Kid in a Outdoors is a program run by the United States National Park Service in which fourth graders in the country receive free admission to National Parks, federal land, and water recreation areas. The program was created by Barack Obama in 2015 as Every Kid in a Park.

  3. Schroeder stairs - Wikipedia

    en.wikipedia.org/wiki/Schroeder_stairs

    Schroeder stairs can be perceived in two ways, depending on whether the viewer considers A or B to be the closer wall. Schroeder stairs (Schröder's stairs) is an optical illusion which is a two-dimensional drawing which may be perceived either as a drawing of a staircase leading from left to right downwards or the same staircase only turned upside down, a classical example of perspective ...

  4. Shepard tables - Wikipedia

    en.wikipedia.org/wiki/Shepard_tables

    Shepard tables illusion, named for its creator Roger N. Shepard. Shepard tables (also known as the Shepard tabletop illusion) are an optical illusion first published in 1990 as "Turning the Tables," by Stanford psychologist Roger N. Shepard in his book Mind Sights, a collection of illusions that he had created. [1]

  5. Shepard elephant - Wikipedia

    en.wikipedia.org/wiki/Shepard_elephant

    Blivet illusion, another impossible figure based on figure-ground confusion. The image is widely reproduced and discussed. Brad Honeycutt, author of Exceptional Eye Tricks, calls the Shepard elephant "one of the most famous and classic optical illusions."

  6. House of mirrors - Wikipedia

    en.wikipedia.org/wiki/House_of_mirrors

    The concept has also been used in comics. In Batman: The Dark Knight Returns, Batman is seen chasing the Joker through an amusement park and into a hall of mirrors. It was used to create suspense as Joker could not clearly decipher what was real and what was just an image.

  7. Café wall illusion - Wikipedia

    en.wikipedia.org/wiki/Café_wall_illusion

    But a component of the illusion remains even when all optical and retinal components are factored out. Contrast polarities seem to be the determining factor in the tilt's direction. [10] Richard Gregory visits the original café wall on St Michael's Hill, Bristol, in February 2010 Architecture inspired by the café wall illusion, at Melbourne ...

  8. Penrose stairs - Wikipedia

    en.wikipedia.org/wiki/Penrose_stairs

    The Escherian Stairwell is a viral video based on the Penrose stairs illusion. The video, filmed at Rochester Institute of Technology by Michael Lacanilao, was edited to create a seemingly cyclic stairwell such that if someone walks in either direction, they will end up where they started. [ 12 ]

  9. Rising Card - Wikipedia

    en.wikipedia.org/wiki/Rising_Card

    The Rising Card is a popular category of magical illusion in which the magician causes randomly selected playing cards to spontaneously rise from the center of a deck. [1] Many variations of this trick exist and are widely performed.The effect can be accomplished using a variety of methods and techniques, ranging from pure sleight of hand to ...

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