My dog's always thinking...about food!

Have you ever wondered what's going on inside an Animal's head? How do they see the world -- and us? Is your dog really feeling guilty when it gives you that famous "guilty look?" Do pigeon brains possess "superpowers" that allow them to find their way home across hundreds of unfamiliar miles? David Pogue meets -- and competes -- with a menagerie of smart critters that challenge preconceived notions about what makes "us" different from "them" expanding our understanding of how animals really think. NOVA SCIENCE NOW explains tonight at 9pm