I find this endlessly fascinating: You can create any shape of straight lines by folding a piece of paper and making one single straight cut.
💔 Some older links might be broken — that's the state of the web, sadly. If you find one, ping me.
👆 This is one of 2622 recommended links, manually curated since 2011. If you like things like this, you will love the Weekly Filet newsletter. The five best links of the week, every Friday.