This optical illusion takes a few moments to fully appreciate. Stare at the cross in the center of this blurry image for a few seconds. What should happen is that purple balls should begin to fade one by one, until they're almost invisible to your eye. This effect was discovered in 1804 by a Swiss physician. If we fixate our gaze on a particular point, unchanging stimulus around the area will gradually fade away and disappear.
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https://www.youtube.com/watch?v=2c6wW_Hy8Ms
Shocking video of a car plowing into a diner in Virgil, near Niagara-on-the-Lake, Ontario, Canada. The people in the video are okay, but a warning, you may find this video disturbing. (Courtesy CHCH TV, Hamilton.)
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https://www.youtube.com/watch?v=lXKI6BfR1FE