Science & Futurism With Isaac Arthur

What if alien civilizations exist—but chose to hide? Exploring shadow empires, cosmic silence, and the limits of secrecy in space.Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthurCheck out Mad Kings: https://nebula.tv/madkings?ref=isaacarthurWatch my exclusive video Chronoengineering: https://nebula.tv/videos/isaacarthur-chronoengineering-manipulating-time-as-technology