Vietnam war

Pigeons: Homing, Passenger, Carrier and Otherwise

Pigeons can get a little confusing. Passengers, messengers, carriers, homing - the list goes on. But when it comes down to it, they're all variations of the same smart bird with a knack for getting home to roost. Learn about these clever creatures in today's episode.

A follow-up on the Japanese stragglers episode.

Agent Orange was a potent herbicide used by the U.S. government during the Vietnam War. Learn more about the origins, use and devastating side effects of Agent Orange in this podcast from HowStuffWorks.com.