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Spiral-jetty-from-rozel-point.png (800 × 450 pixels, file size: 530 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
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Date: 28 June 2024: Source: Combination of the following images: File:Clevelandart 1988.5.jpg File:Central Europe, Bronze Age, c. 2500-800 BC - Spiral Armilla - 1988.4 - Cleveland Museum of Art.tif
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The Ulam spiral or prime spiral is a graphical depiction of the set of prime numbers, devised by mathematician Stanisław Ulam in 1963 and popularized in Martin Gardner's Mathematical Games column in Scientific American a short time later. [1] It is constructed by writing the positive integers in a square spiral and specially marking the prime ...
The earliest form of notebook was the wax tablet, which was used as a reusable and portable writing surface in classical antiquity and throughout the Middle Ages. [1]As paper became more readily available in European countries from the 11th century onwards, wax tablets gradually fell out of use, although they remained relatively common in England, which did not possess a commercially ...