What’s the deal with tinfoil?

Nowadays, almost everyone knows the trope of the tinfoil hat -- it's common in all sorts of fiction, often meant as visual shorthand to indicate the person wearing this hat is... weird. But how did something as mundane as tinfoil become associated with paranoia and conspiracy? In today's episode, Ben, Matt and Noel get to the bottom of this strange, strange story. See omnystudio.com/listener for privacy information.