You made 12 candy apples last year. The candy was glassy and red. The bowl of edible glitter sat across the kitchen, and by the time you reached it, the first apple was already hard. The glitter never touched a...

Standing in front of a shelf of shimmer, most people pick the shade they can already picture in the glass. It is a reasonable way to choose and it is not the way the shelf actually moves. We can see...