Luis M. Chiappe is the vice president for research and collections at the Natural History Museum of Los Angeles County, where he directs the museum's Dinosaur Institute, and an adjunct professor at the University of Southern California. He is the author of Glorified Dinosaurs: The Origin and Early Evolution of Birds and the coeditor of Mesozoic Birds: Above the Heads of Dinosaurs. Meng Qingjin is the director of the Beijing Museum of Natural History, vice chairman of the Chinese Association of Natural Science Museums and the Beijing Zoological Society, and the director of China's Natural History Museum Committee.