Horror movies have changed over time to keep engaging audiences. In the 1960s, Dracula was scary due to its supernatural elements, which were unfamiliar, but today's audiences are desensitized to supernatural themes. Similarly, films like The Curse of Frankenstein in the past terrified viewers by exploring unknown scientific possibilities, but advances in knowledge have reduced their shock value now. Recent horror films like Pulse and One Missed Call scare audiences through technology like phones, adapting to changes in what people find frightening.