Bells! Plus a clever word game and a cursed font.

• Is it too basic to link to a TED talk? Possibly. Surely most newsletter readers have already seen it. And it is too obvious to link to a Jacob Collier video? Possibly. I've certainly done that before. But what a spectacular video. "You know this song (but the orchestra doesn't)" is a slightly-clickbait title because, as Jacob gives instructions to the on-stage orchestra note-by-note and player-by-player, you can see that some of them clock what's happening. Maybe you will as well: there'll likely be a point where you recognise what's being put together. But do yourself a favour: go in unspoiled, don't read the comments, and just enjoy the results. (Credit, also, to whoever did the audio mix for this; it can't have been easy.)
   
• Thanks to both Eli and Noah for sending in this video from SimonRetro, breaking down the old Scantron test-scoring system that used to be common in (mostly American) schools. It's fascinating. I think there may be a bit too much detail in this video, and perhaps it would have been better to interlace the explanation and teardown sections -- but too much detail here, I think, is better than not enough.
   
• And thanks to Grace for sending over Electrical Basics Made Easy: the start of what is, ostensibly, a professional training program for refrigerator technicians... but which is also a good, general introduction to how electricity and electronic circuits work. There's a whole series here that feels like a well-produced school curriculum, and which really shows off how much the internet, and YouTube, have democratised education.
   

• Ribbit is a brilliant daily word game. As you find the words, the puzzle gets smaller, with no-longer-useful routes cut off: and that, over time, makes the puzzle easier, in a way that's somehow really pleasing. Given enough time, you can always clear the board and release the frogs.
   
• A font that generates QR codes is cursed genius.
   
• Are crows really our friends? "An investigation into the state of corvid–human relations."
   

And finally: one man fails repeatedly to guess the character. (Strong language.)

All the best,

— Tom