Watch: Harmonograph machine made of cardboard draws beautiful Lissajous figures with a pen
Harmonographs are mechanical devices using pendulums connected to a pen to draw geometric images.
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Reading
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1The problem with David Attenborough’s spectator environmentalism
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2‘Brown’ review: Gripping series overcomes plotting holes through memorable characters
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3For young readers: How wrestler Aman Sehrawat became the youngest Indian to win an Olympic medal
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4Review: ‘The Pyramid Scheme’ cheats on a promising idea
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5In this speculative memoir, an academic writes about chronic pain and liminal spaces she exists in
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6Bhopal’s Barkatullah University to be renamed Vagdevi Bhojpal University
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7‘Bandar’ review: A relentlessly grim, needling statement on MeToo
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8How Vulcan, a hypothetical planet, helped prove Einstein’s theory that gravity is curved spacetime
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9‘100 is just a number’: PM’s economic adviser says rupee should ‘find its own value’
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10Review: In ‘Maa Behen’, the joys of misbehaving women
