Search for extraterrestrial intelligence

Search for extraterrestrial intelligence (SETI for short) is a scientific effort to find evidence of life beyond Earth. Scientists use big telescopes to look for signals from outer space, which might come from intelligent aliens. They look for things like radio waves from alien starships and messages from distant planets. It's like playing a game of hide-and-seek, but instead of looking for hiding people, we're looking for signs of intelligent life in the universe!