Science fiction is a genre of literature and media that explores imaginative concepts often based on advanced science and technology. It frequently includes elements such as space travel, time travel, extraterrestrial life, and futuristic societies. Works in this genre can range from serious explorations of scientific possibilities to entertaining adventures in fantastical worlds. Common themes in science fiction include the impact of technology on society, the nature of humanity, and the exploration of unknown realms. Notable examples include classic works like Isaac Asimov's "Foundation" series and Philip K. Dick's "Do Androids Dream of Electric Sheep?" which raise questions about identity and morality in a changing world.