5-1-13 DAVID QUAMMEN In his latest book, Spillover: Animal Infections and the Next Human Pandemic, he tracks down the animal origins of such viruses as HIV/AIDS, SARS, Ebola, Marburg and Influenza; and bacteria such as Lyme Disease and Q Fever. Among other questions he investigates are: Why do strange new diseases emerge when they do, where they do, as they do – and not elsewhere, other ways, or at other times? Is it happening more now than in the past? And the biggest question: what sort of nasty bug, with what unforeseen origins, and what inexorable impacts will emerge next?