Our world is ancient, but the Universe is far older. What were those first planets like, and how soon can life emerge on new ones? Watch my exclusive video Crystal Aliens hhttps://nebula.tv/videos/isaacarthur-primordial-planets Get Nebula using my link for 40% off an...
Dinosaurs once ruled the world, and scifi often speculates they may have been a technological civilization that was wiped out. Is there even a small chance this is true, and if so, wiped out by what and who? And could we even tell? The Silurian Hypothesis:...
Start listening with a 30-day Audible trial and your first audiobook is free. Visit http://www.audible.com/isaac or text "isaac" to 500-500. The Silurian Hypothesis contemplates how long the ruins of a civilization would be detectable, on Earth or even other worlds,...