In this episode of Stuff You Should Know, Josh and Chuck discuss SWAT teams, elite police units that are specially trained for extreme situations.

Instead of actually detecting lies, polygraph machines sense physiological variations, ostensibly brought on by guilt. The results are subject to interpretation, and therefore controversial. Join Josh and Chuck as they investigate the polygraph.

If you're accusing someone of disloyalty or subversion without decent evidence, then you may be guilty of McCarthyism. In this episode, Josh and Chuck explore the origin of the term, starting with the infamous Communist-hunting Senator Joseph McCarthy.

Avoiding food for religious or health reasons has been around for millennia. But while God may appreciate the sacrifice, how does it affect the body? Join Josh and Chuck to find if fasting actually can be healthy or if it’s as bad an idea as it sounds.

When you think of animal migrations, you probably picture thousands of animals thundering across the savannah. But where are they going, and why? Josh and Chuck explain why and how animals migrate in this episode.

The world's problems necessitate innovative solutions. Listen in as Josh and Chuck propose some innovations, from teleportation to an international language, that the world needs right now in this podcast from HowStuffWorks.com.

In this episode of Stuff You Should Know, Josh and Chuck take a look at the advertising practice of product placement, from its origins to different types to classic examples in film and television.

These days, alcoholics and other people suffering from addictions are often sent to rehabilitation centers to kick their habit. But how long has rehab been around, and how does it work? Listen in as Chuck and Josh present the fascinating process of rehab.

Fascism is a specific political philosophy that's often mistakenly used to describe any authoritarian, supressive movement or regime. Josh and Chuck discuss the origins, history and markers of Fascism in this episode.

Hallucinogenic drugs are currently illegal, but they were once commonly used in psychological treatment. In this episode, Josh and Chuck discuss the rise and fall of psychedelics in treating mood disorders -- and why they're starting to gain favor again.