This is one page of a workbook I completed for my last required course at YU. For those who can't read my handwriting, at the bottom I wrote: "I'm a physics major, so I'm used to drawing spherical cows." Be sure to click the picture to see it full-size.
For more cow fun, and many cow puns, you should check out the "Cows With Guns" Flash animation by Bjørn-Magne Stuestøl [link, alternate YouTube link]. And yes, I only included his name because of the ø's.