If alien signals have already reached Earth, why haven't we seen them?

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp question: if alien signals have already reached Earth without us noticing, what should we realistically expect to detect today?

Obama says aliens exist, but not at Nevada’s Area 51

Attention, local extraterrestrial believers and conspiracy theorists: former President Barack Obama said in a podcast interview Saturday that aliens are real, but they aren’t at Nevada’s Area 51. During an appearance on YouTuber Brian Tyler Cohen’s show,