What happens when nature and humanity clash? Travel to the bear-busy back alleys of Aspen, the gull-vandalised floral displays at the Vatican and leopard-terrorized hamlets in the Himalayas, then meet the behind-the-scenes experts trying to broker peace. Mary Roach delves into these issues and more in a whip-smart tour of what happens when wild animals and humans bump into each other. When nature breaks the law ...