We all love to laugh, no matter when, where, or how we’ve lived. Amazingly, there are a handful of topics that have given us the giggles for at least 5,000 years. And a lot of them involve 6th-grade humor.

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