In 2017, Rhett Barker and his friends needed a way to stay in touch after graduating college. They were ecology majors, and meme groups were in vogue, so they created Wild Green Memes for Ecological Fiends on Facebook. It began as a place to share silly nature-centered memes. The jokes were...

In 2016, followers flocked to an Instagram user purporting to be Miquela Sousa, a 19-year-old Brazilian-American model, singer, and sometimes activist. For years, no one was quite sure if Miquela was made-up, or to what degree. Was she a model rendered doll-like by filters? An actress? A totally...