Why havent we found aliens A physicist shares the most popular theories Brian Cox By: Big Think

Calculating The Odds of Intelligent Alien Life Jill Tarter By: TED-Ed

How many universes are there Chris Anderson By: TED-Ed

Where are all the aliens Stephen Webb By: TED

Why Alien Life Would be our Doom The Great Filter By: Kurzgesagt – In a Nutshell

Brian Cox Debates If Aliens Have Visited Earth By: High Performance