Many people who have ever owned a pet will swear that their dog or cat or other animal has exhibited some kind of behavior they just can't explain. How does a dog know when its owner is returning home at an unexpected time? How do cats know when it is time to go to the vet, even before the cat carrier comes out? How do horses find their way back to the stable over completely unfamiliar terrain? These intriguing questions about animal behavior convinced world-renowned biologist Rupert Sheldrake that the very animals who are closest to us have much to teach us about biology, nature, and consciousness.