"Spherical cow" has become a metaphor for highly simplified scientific models of complex real life phenomena. The joke goes:

Milk production at a dairy farm was low, so the farmer wrote to the local university, asking for help from academia. A multidisciplinary team of professors was assembled, headed by a theoretical physicist, and two weeks of intensive on-site investigation took place. The scholars then returned to the university, notebooks crammed with data, where the task of writing the report was left to the team leader. Shortly thereafter the physicist returned to the farm, saying to the farmer "I have the solution, but it only works in the case of spherical cows in a vacuum."

So, naturally, I had to make one.

Step 1: Materials

You'll need:
- a white beach ball
- a wide-tip permanent marker (e.g. Sharpie Magnum)
- a pencil (optional)
I love these! I had to explain the joke once to some people, but I don't know if they appreciate the humor.

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