People around the world eat processed foods -- and it's likely that you've either just eaten (or are about to eat) something containing any number of synthetic flavors, preservatives or other additives. So what's in all this stuff? Write to Matt and Ben to let them know which food additive you think is the world's most dangerous, and why.

Brominated vegetable oil is in a surprisingly large range of food products - but what is it, exactly? Are the health concerns surrounding this ingredient alarmist, or...? Listen in to learn more.

You may not have heard the phrase "militarization of police", but you've probably seen the process in action. Whether in an unstable foreign land or in your own country, various groups are claiming that local law enforcement and militaries are becoming increasingly intertwined. But why? What happens next?

You've probably heard it in the news lately: more and more police departments are getting military-grade weapons, training, and equipment. But how did this trend start? Where is it headed? And why is it happening in the first place?

It's an increasingly important question, and various sources will give you differing answers. Tune in to learn more about the legality of recording law enforcement (and why some privacy advocates believe these laws are changing).

Did an electrical engineer from the 1920s really invent a device capable of harnessing zero-point energy? What happened to it? Listen in to learn more about the fiction and fact surrounding this bizarre story of conspiracy theory, technological suppression and more.

For centuries people have tried to invent perpetual motion machines and many inventors have claimed they successfully cracked the laws of thermodynamics. But have they?

When impoverished inventor Nikola Tesla died in New York City, the U.S. government confiscated his notes. Why? Were they trying to steal his technology? Did they ever relinquish the notes? Tune in to this episode to find out.

What exactly lurks in catacombs? Where are the world's largest? Join Ben and Matt as they dive into the murky world beneath our feet.

In cities across the planet, an invisible world stretches beneath your feet. What's down there, exactly? Plague victims, secret crypts, party spaces, squatters, and...? Join Ben and Matt as they tackle one of the most important parts of the catacomb story: Figuring out how to get in.