Marcello Seri

A single-line drawing arising from an open knight's tour of an 81x81 chessboard. From a distance, the drawing looks like a 9x9 latin square of 9 different motifs. Each motif is an open knight's tour of a 9x9 chessboard. #mathart

legendary

Sir #DavidAttenborough “Things are going to get worse. This is the new extinction." "We are in terrible, terrible trouble and the longer we wait to do something about it, the worse it is going to get." #ClimateCrisis vox.com/2019/4/12/1830…

I suppose it had to happen. I decided to video myself solving a few more problems about invariants, but I got stuck on one. I still intend to try to solve it at some point, so I'm not looking for help! It isn't a very interesting video, but ... youtube.com/watch?v=jEj8OB…

Here's a fun and cool physics problem! @stevenstrogatz noticed that the brushed steel in his elevator produces these weird looking curves. Many people are guessing they are hyperbolas and parabolas, and thinking of conical sections. Good guesses, but not correct!