I'm not very interested in nature photography. People and their creations have a stronger pull on me; I'm a city boy. Occasionally, though, something tugs me in the opposite direction. The photographer and teacher Bryan Peterson urges his students to get down on the ground on their bellies, use a wide angle lens, see what's coming out of the earth and what surrounds it. This is a bed of tulips and other flowers at the Missouri Botanical Garden. The photo has a shallow depth of field, out - in - out of focus. I got my shirt a little dirty, according to instructions.TOMORROW: Arthritis