The end of everything has been on Barry Vacker's mind. The professor of media studies at Temple put together three days of art, film, lectures and music revolving around the idea of apocalypse last month. He has tracked how visions of end-times have evolved from earliest myths to the latest social media-driven memes. "Technology is evolving rapidly and I think many people are fearful of what it signifies," said Vacker. "A sense of loss, a sense of an end, an end to a certain vision of America."