We're transporting you to the Fitzgerald Theater in St. Paul for a segment from a recent live show: Cats vs. Dogs. In this very important debate, producers Marc Sanchez and Sanden Totten try to get the bottom of our feline friends' mysterious behavior. Plus: The mystery sound!

Nasal mucus is very important to our health – and actually kind of magical. There’s a lot going on in our noses all the time that we don’t appreciate. Where do boogers come from? Why does your nose run when you’re out in the cold? Why does your nose get stuffy when you’re sick?

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Nasal mucus is very important to our health – and actually kind of magical. There’s a lot going on in our noses all the time that we don’t appreciate. Where do boogers come from? Why does your nose run when you’re out in the cold? Why does your nose get stuffy when you’re sick?

Can you tickle yourself? Probably not. Almost everybody is ticklish, but what’s happening to us is a bit of a mystery.

See omnystudio.com/listener for privacy information.

Can you tickle yourself? Probably not. Almost everybody is ticklish, but what’s happening to us is a bit of a mystery. We talk to a neuroscientist about how our skin and brain are connected, and a paleoanthropologist about why it make us a laugh.