Chuck

Although they seem pretty mundane, saunas are surprisingly fascinating inventions. Josh and Chuck break out all sorts of sweaty, sauna-related trivia, from the Finnish affinity for saunas to sauna etiquette, in this episode.

Taste and How it Works

Taste seems like a pretty simple sense, but scientists are still trying to figure out exactly how it works. Josh and Chuck explore the complexities of taste, from definitions and physiology to tongue maps and supertasters, in this episode.

A large percentage of the world's population believes that you will be reborn after you die. So why does the concept of reincarnation seem so paranormal to Westerners? Join Chuck and Josh as they explore the ins and outs of birth, death and birth again.

Butterflies' wings are colored as a result of iridescence; this fascinating optical phenomenon is the result of light refracting off transparent surfaces. Josh and Chuck reveal how pigmentation, iridescence, light and butterfly wings work in this episode.

Voodoo is a religion found in parts of Africa and Haiti that's often misunderstood. In this episode, Josh and Chuck separate the faction from the fiction as they explore how Voodoo really works.

Thomas Jefferson is famous for his role in shaping the United States of America -- and for creating his own, revised version of the Bible. Learn more about the Jefferson Bible in this episode.

Whether you've been stuck in a traffic jam or forced to merge and avoid road construction, everyone's had a few bad experiences with traffic. But how does traffic actually work? In this episode, Chuck and Josh take a look at traffic waves (and bubbles).

In many films, hapless characters meet their untimely demise in a lethal pit of quicksand. It's a gruesome, undignified end -- but is it realistic? Josh and Chuck tackle the properties of quicksand -- and how to escape it -- in this episode.

In this episode, Josh and Chuck discuss the controversial "ghost prisons," covert prisons created by the CIA after September 11th, 2001 to secretly detain and interrogate terrorist suspects in various locations around the world, including the U.S.

The Samurai were legendary Japanese swordsmen and warriors, known for their loyalty and adherence to a strict code of honor. Josh and Chuck tackle the Samurai in this episode.