I read from Epicurean to epidemiology.

Epicurus very humbly founded Epicureanism. I do appreciate that it's about peace of mind and freedom from fear. 

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

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

I'm not sure why epicycloids are important or how we use them, but here you go!

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

The word of the episode is "epidemic".

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