|As much as one-fifth of all cancers are caused by viruses—some that we encounter every day. If we fail to develop a comprehensive understanding of how these viruses work, we may soon be faced with a cancer pandemic. Human papilloma viruses (HPVs) are a diverse family of DNA viruses that commonly infect the skin and mucosal membranes of humans. This science bulletin will follow recent investigations into HPV, dispelling myths about treatment and offering insight into how viral-mediated cancers work. From the American Museum of Natural History.