And some happy news for those who like miscellaneous collections of mathematics stuff. Jeremy Kun has published the 197th edition of the Carnival of Mathematics. This differs from the Playful Math Education Blog Carnival in not having a specific focus on educational or recreational mathematics. That’s not to say there isn’t fun little stuff mentioned here. For example, Kun leads with a bit of trivia about 197 as a number. But there’s a stronger focus on more serious mathematics work, such as studying space-filling curves, or a neat puzzle about how to fold (roughly) equilateral triangles without measuring them.