Scratch-off tickets are big money for state-run lotteries. Is it the promise of winning big that keeps players in the game? Or is there something else happening in the brain? NOVA is available to ...

If you have a cat, you’ve probably endured your fair share of unwanted furniture scratching. Maybe you’ve purchased scratching posts, rearranged your furniture, or played with your cats before bed, to ...

Why do some cats and dogs practically melt with joy when they get a good head scratch? The answer is different for Fluffy than it is for Fido, although they do share a few reasons for why they sink ...