The usual story, presented in usual way - there is a horrible danger that could destroy Earth or at least kill all the human beings on it, but there is one person (or group of scientists) that is/are the only hope. Where have you seen it? Of course in low budget scifi / horror flicks from 1950s or 1960s. And now in Hollywood blockbusters.
Sci-Fi Blog - even though science fiction started before 20th century a lot of people don't realize how vast and rich this genre really is. In United States many people associate sci fi with the Marvel comics and superhero stories, while the core of the science fiction is in the reaching for the future and exploring not only space, but also ourselves.