Are we alone in the universe?

The answer

The Search for Extraterrestrial Intelligence (SETI) has been scanning the skies for artificial signals since 1960, when Frank Drake pointed a radio telescope at two nearby Sun-like stars. Despite monitoring millions of stars across various frequencies, no confirmed extraterrestrial signal has been detected. However, the search has barely scratched the surface - analyzing the full sky across all frequencies has been compared to searching a single glass of water from Earth's oceans. Modern SETI uses AI to sift through vast datasets, and the detection of thousands of exoplanets has fueled optimism that we may not be alone.