Alien life refers to any living organisms that might exist outside of Earth. These beings could be very different from us, ranging from tiny microbes to complex creatures. Scientists search for signs of alien life by studying planets and moons in our solar system, like Mars and Europa, which may have conditions suitable for life. The idea of alien life has fascinated humans for centuries, inspiring countless stories in books and movies. Many people wonder what these aliens might look like and how they would communicate. The search for extraterrestrial intelligence, or SETI, aims to detect signals from advanced civilizations in the universe.