Why are green and red Christmas decorations so vibrant? Why does looking at a lush green forest against a blue sky feel so soothing? Why might you get weird looks dressed in bright yellow and bright ...

I can’t get enough of Christmas. Pile it on: inflated Santas, Andy Williams on the radio, lawsuits over Nativity scenes, all of it. It is, as Andy intones, the “hap-happiest season of all.” Well, it’s ...