Math Mutation. Welcome to the Twilight Zone. If we change this red digit of pi (π) from 0 to 1, would this "Mutant π" still be irrational? Would it still be a transcendental number? Could physicists & engineers use the mutant as if it were π, without deleterious consequence?

Not a single curved line. Yet your eyes see a spiral.

Why do you sometimes feel like someone is watching you - even when nobody is there? That sudden feeling that someone is behind you can be surprisingly powerful. But it doesn't necessarily mean anyone is watching. Your brain constantly scans your surroundings for signs of danger and social attention, often before you're consciously aware of what you've noticed. A faint movement in your peripheral vision, an unfamiliar sound, or even anxiety can make your brain interpret uncertainty as a possible threat. And once you expect someone to be watching, you may start interpreting ordinary sounds and movements as evidence. The unsettling part? Your brain can make you feel watched without giving you reliable evidence that anyone is there. Sometimes, the feeling is real. The threat may not be.

today's math test: composing a song on a graphing calculator using a circle of fourths pattern