"I'm so excited for this!" Chris Perfetti says as he approaches the Natural History Museum of Los Angeles County. Our greeting is drowned out by a cacophony of nearby construction and clusters of energetic children on field trips shuffling down the pathway — in the distance, a row of yellow school buses that snake the perimeter stand guard. Perfetti, in monochromatic black sweats, T-shirt and baseball cap, is just four steps into the rotunda, under the shadow of the museum's famous Three Graces... Read this story