In a time of viral sensations, the influence of photojournalism can go beyond newsworthiness, as images are propelled into an online world where stories are shaped in an instant. Think of the first image you saw of Thailand’s famous pygmy hippo Moo Deng, which spread across social media in September so rapidly you almost couldn’t keep up; it created a global star and drove new levels of tourism to the Khao Kheow Open Zoo.