“Crossover' is a word scientists use to describe dolphins' soaring over seas, their traveling so free and fast, so high-spirited and almost effervescent that their sleek bodies barely skim the waves. The suggestion of splashes from tail and pectoral leaves a luminous wake across the water. For these crossover miles, the dolphins, like their human terrestrial mammal kin, belong more to the element of air than the sea....Held in [the dolphins'] fluid embrace, I pulled my arms close against my sides and our communal speed increased... Racing around the lagoon, I opened my eyes again to see nothing but an emerald underwater blur. And then I remembered what I had either forgotten long ago or never quite fully realized. This feeling of being carried along by other animals was familiar.Animals had carried me all my life. I was a crossover--carried along in the generous and instructive slipstream of other species. And I had always navigated my life with them in mind, going between the human and animal worlds--a crossover myself. By including animals in my life I was always engaging with the Other, imagining the animal mind and life. For almost half a century, my bond with animals had shaped my character and revealed the world to me. At every turning point in my life an animal had mirrored or influenced my fate. Mine was not simply a life with other animals, but a life because of animals.It had been this way since my beginning, born on a forest lookout station in the High Sierras, surrounded by millions of acres of wilderness and many more animals than humans. Since infancy, the first faces I imprinted, the first faces I ever really loved, were animal.”