[plank]

Only explanation: No physicists were involved in painting these cows. (Everybody knows that physicists only know spherical cows) Kind regards, Roel (yes, physicist by origin)

[_yb2s]

Physicists switch between square, spherical, and cylindrical cows depending on the coordinate system they are working in. However they would be squares with a unitless volume and length of 1. There is no need for rectangular cows, because you can just redefine the basis vectors to make it square.

[hehehheh]

Can you make a square cow from a spherical cow using only compass and straight edge?

[zehaeva]

I came here to make this same joke good sir! You beat me to it!