The Nazis not only had a deluded belief in their own racial superiority, some of their top leaders believed they were superhumans descended from the inhabitants of the lost city of Atlantis. (They had a whole branch of the military dedicated to proving that.)

The Backstory: Technology: Where We Came From and Why We’re So Lonely
10:30

The Backstory: The London Fog That Killed 12,000
10:19

The Backstory: Sibling Squabbles in Royal Families
09:59