It was only in the last few decades that science became aware that itches aren't just low-level pain. And in that time, the mystery of how we itch and why we scratch has gotten even more baffling.
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Selects: How Narcolepsy Works
52:41

Rope, yeah ROPE!
43:31

Short Stuff: Did a shipwreck double the size of the United States?
11:46