Private equity is a business operation where companies are bought and run at their leanest to maximize returns for a handful of investors. It can be a lifeline for a flailing company or run it into the ground. Either way, PE firms make out like bandits.

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Why aren't there lemurs in Africa? That question created a whole theory about a lost continent. Turns out it's not true.

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In 1922, a pastor and his mistress were murdered in New Jersey. Nobody was ever convicted of the crime even though it seems clear who did it.

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Rape kits are simple forensic evidence collection kits used when someone is sexually assaulted. But the story is deeper than this. Learn all about rape kits, the sad backlog problem, and what you can do to help, in this classic episode.

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In part two of Heavy Metal Week Josh and Chuck break down how specialized heavy metal music has become, talk about some of the great album covers, look at how metal hits the brain, and explain the sad death of guitar great Randy Rhoads.

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Metal fans have many ways to express themselves, but none are as metal as throwing the devil horns. But who did it first?

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Some of the most talented musicians in the world play heavy metal, some of the hardest-hitting music ever made. In this episode Chuck and Josh wade into the history of the genre, and try to get to the bottom of where the name came from.

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In the absence of an official explanation of why flight MH 370 disappeared in 2014, conjecture and conspiracy theories have filled the vacuum. Find out the current state of things in this classic episode.

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