Spirograph effect in HTML canvas
Bl.ocks.orgIf you like maths and drawing – or just like to bring back a childhood memory – this will keep you busy for quite a while…
Published in Weekly Filet #267
Maths
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Curta: a mechanical pocket calculator
Technophilic MagazineI’m years late to this, but totally flabbergasted. What a great piece of engineering.
Published in Weekly Filet #240
The Riddler
FiveThirtyEightMath and logic riddles. Sometimes unnervingly tricky. Highly addictive.
Published in Weekly Filet #237
Bias in the ER
NautilusHumans are notoriously bad at understanding probability – and as a consequence make bad, unreasonable decisions, both in experiments and in real life. When you’re in a hospital, you better hope your doctor knows a thing or two about probability. This excellent piece goes deep on the issue (and serves as a reminder that you should read Kahneman’s «Thinking, Fast and Slow» if you haven’t already).
The Fold-and-Cut-Problem
Eric DemaineI find this endlessly fascinating: You can create any shape of straight lines by folding a piece of paper and making one single straight cut.
Published in Weekly Filet #226