We watch stories about psychopaths on TV and in the movies, but what exactly is a psychopath? How percentage of the population are psychopaths? What careers have the most and least number of psychopaths? And, are you a psychopath?

Almost 50% of Americans are married. But what's the best age for getting married? How often are married couples having sex? Do married couples make more money? And what are the top reasons why couples get divorced?

Everyone pays income tax, but have you ever wondered how much money is collected and how the government spends it? Just how much of all income tax are being paid by the rich and the poor? What makes you more likely to get audited by the IRS? And, why doesn't the government just do our taxes for us?

In the second episode of this two-part series on sleep, we take a look at the most popular sleeping positions, which country gets the most and least sleep, and some common myths about sleep.

Everyone needs to sleep, but most people are not getting enough of it. In the first episode of this two-part series, we look at how much sleep you should be getting, what happens if you don't get enough sleep, and what's the world record for most days without sleep.

In this episode, we dive deep into farts. How often do people fart on average? Why do farts smell? And, can you light a fart on fire?

From pagans whipping women to buying presents for pets, this episode is all about Valentine's Day! How much do people spend on Valentine's Day, who spends more money, and what are they spending it on?

Caffeine is the most widely used psychoactive drug in the world. But how much should you have per day? What does caffeine do to your brain? And are there any long-term benefits of caffeine consumption?

Pennies are everywhere, and we're making more all the time. But does anyone even want them? Just how much does it cost to make a penny? In this episode, we explore the arguments for and against the penny.

You've heard of common expressions like "once in a blue moon" and "cat got your tongue". But where did these expressions come from?