Science educator and bat biologist Dan Riskin catches us up on what's new in his world: it mostly involves snow tires and AI. Dan askes David if he's bought a home yet. Astronaut Chris Hadfield's name gets dropped, which leads nicely into reports of the horrible thing that happens to your fingernails after a spacewalk. Dan brings up how a bat with a perplexingly large penis mates. David talks about how genitals came out during his Thanksgiving. The two discuss the benefit of extra appendages. David and Daniel schedule their next interview.

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