Your Brain Is Hiding Things From You

What if reality isn’t what you think it is? In this episode of The Box of Oddities, Kat and Jethro peel back the limits of human perception—starting with a real scientific phenomenon that suggests some people can see millions more colors than the rest of us. Meet the mysterious test subject known as CDA-29, whose vision may reveal that what we call “reality” is just a simplified version our brains can handle. If that’s true… what are we not seeing? Then, the journey shifts from science to something far more unsettling. Deep within the historic forts of San Juan, Puerto Rico, a sentry once vanished without a trace—sparking centuries of chilling theories involving vampires, shadowy creatures, and something lurking just beyond the edge of perception. Fast forward to the 1970s, and reports of blood-drained livestock begin surfacing across the island… leading to one of the most infamous cryptids in modern history: the Chupacabra. Is it folklore? Misidentified animals? A military experiment gone wrong? Or something far stranger? Plus, in this episode’s “Thing in the Middle,” discover some of the strangest taxes ever imposed—from urine in Ancient Rome to window taxes that literally darkened cities. This episode blends science, mystery, and the unsettling possibility that the world around you is far more complex—and far more terrifying—than you realize. Learn more about your ad choices. Visit megaphone.fm/adchoices

You can listen to Your Brain Is Hiding Things From You online on Radio and Podcast. Open the player on this page to stream the available audio.

Your Brain Is Hiding Things From You is an episode from The Box of Oddities by John Elliott and Kat Walls.

This episode is 40:10 long.

This episode was published on Apr 8, 2026.

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