Human attachment is thousands of years old but Valentine’s Day started off as a blood soaked pagan fertility festival, and it wasn’t much fun for women. On the flip side, the romance element is a recent invention. You can thank the Victorians for that.

The Backstory: Shocking Death of a Heroic 9/11 Widow
10:31

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