Why do we have different currencies at all?

Why does the US have dollars, Japan has yen, and your vacation money needs swapping? We trace currency all the way back to cows and seashells.

What is How'd That Happen??

A fast-paced podcast that answers "how'd that happen?" — from ancient empires and world-changing inventions to money, science, and cultures around the globe. Each ~8-minute episode is built to spark real curiosity in kids ages 8-14. Perfect for car rides, it's made for parents who want to swap a little screentime for conversations worth having.