I read from derivative to dermatology.

The word of the episode is "dermatoglyphics".

https://en.wikipedia.org/wiki/Dermatoglyphics

Theme music from Jonah Kraut

https://jonahkraut.bandcamp.com/

Merchandising!

https://www.teepublic.com/user/spejampar

"The Dictionary - Letter A" on YouTube

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