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A harmonograph is a mechanical device that uses swinging pendulums to draw pictures, believed to be originally invented in 1844 by Scottish mathematician Hugh Blackburn. There are other types of harmonographs, but this 3-pendulum rotary type gives a wide variety of pleasant results, and is fairly easy to build once you've settled on a design and have acquired the appropriate materials and tools. This is a great project to do with kids and can result in endless experiments creating new types of geometric designs.
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A portrait of Alice Liddell (right) – Lewis Carroll's inspiration for Alice's Adventures in Wonderland – and her two sisters, in a photograph Carroll took in 1859.
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The incredibly simple trick involves putting the dice in your oven, and melting them just enough so they get a tiny bit heavier on the bottom.
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In 1967 Russian scientists created the first animated sequence using a computer.
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Datenschutz ist nicht gleich dem Kampf um digitale Freiheitsrechte. Er dient bestimmten Vorstellungen von Staatsrecht, “geistigem Eigentum”, Menschenbild und Status Quo. Ihm entgegen lassen sich Daten-Explosion und Erosion des Privaten nicht nur als Gefahr, sondern auch als emanzipative Chance begreifen.
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