Alien races refer to hypothetical or fictional species that originate from planets other than Earth. These beings are often depicted in science fiction literature, movies, and games, showcasing a variety of physical forms, cultures, and technologies. Some popular examples include the Vulcans from Star Trek and the Wookiees from Star Wars. The concept of alien races raises questions about the possibility of life beyond our planet. Scientists search for extraterrestrial intelligence through programs like SETI, which scans the cosmos for signals from advanced civilizations. The study of astrobiology also explores the conditions necessary for life to exist elsewhere in the universe.