Sometimes art springs from the most unintended sources, which is just what happened when the S.B. Zoo bought an X-ray machine to aid in the medical diagnoses of their critters. While it did serve its veterinary purposes, the machine also unwittingly became a creator of fascinating imagery worthy of adorning gallery walls. So that’s just what the zoo folks did: Animals … Inside Out is a 28-piece exhibit currently on view in the Volentine Family Gallery. Check out the arresting radiographs that include the body of a boa, the skull of a giant anteater, and the kidney stones of an otter, among others. The exhibit shows through June 29. Call 962-5339 or see sbzoo.org.