The original version of this story appeared in Quanta Magazine. If you want to tile a bathroom floor, square tiles are the simplest option—they fit together without any gaps in a grid pattern that can ...

Dear Annie: I’m a 44-year-old autistic man living in Montana. I am happily involved with a woman who has five kids, ages 12 to 24. My question is about breaking unhealthy patterns. Growing up, my ...