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Impossible object: Irradiation illusion: Isometric illusion: An isometric illusion (also called an ambiguous figure or inside/outside illusion) is a type of optical illusion, specifically one due to multistable perception. Jastrow illusion: The Jastrow illusion is an optical illusion discovered by the American psychologist Joseph Jastrow in 1889.
A pair of mating D. femorata in the Hudson Highlands region of New York. The common walkingstick is a slender, elongated insect that camouflages itself by resembling a twig. . The sexes differ, with the male usually being brown and about 75 mm (3 in) in length while the female is greenish-brown, and rather larger at 95 mm (3.7 i
A skill toy is an object or theatrical prop used for dexterity play or an object manipulation performance. A skill toy can be any static or inanimate object with which a person dances, manipulates, spins, tosses, or simply plays. Most skill toys are played alone, although some can be played with multiple people (such as footbag, juggling, and ...
The long thin body is very hard to make out from real sticks which provides these insects with a way to hide in plain sight. As well as looking like a small branch in a tree, stick insects also behave like a part of the tree, performing swaying motions to give the appearance of moving in the breeze as the rest of the plant may.
An assortment of club weapons from the Wujing Zongyao from left to right: flail, metal bat, double flail, truncheon, mace, barbed mace. A club (also known as a cudgel, baton, bludgeon, truncheon, cosh, nightstick, or impact weapon) is a short staff or stick, usually made of wood, wielded as a weapon or tool [1] since prehistory.
A single dumbbell-shaped yawara stick. The yawara is a Japanese weapon used in various martial arts.Numerous types of jujutsu make use of a small rod, made of wood, that extends somewhat from both ends of a person's fist which is known as a yawara.
For instance, the middle plane is created by shifting an icon 10 pixels to the left, effectively creating a spacing consisting of 130 pixels. The brain does not rely on intelligible icons which represent objects or concepts. In this autostereogram, patterns become smaller and smaller down the y-axis, until they look like random dots. The brain ...
The stick not in the trapeze is inserted between the strings on either side of the stick in the trapeze. The diabolo is tossed into the air, and the strings form an X. The diabolo is caught on the X, and then it can be tossed and caught again. Suicide/stick release: Any trick in which the performer releases one stick, and catches it again.