Richard Feynman, a celebrated scientist and the winner of Nobel prize in Theoretical Physics, was infamous for barging into any classroom (unrelated to Physics) in his university. He would then ask questions and make his fellow professors uncomfortable.
One day Feynman decided to attend a Biology class. Being aware of Feynman’s history of mischief, the Biology professor posed a condition to discourage him. Feynman could attend the class provided he would do all the assignments and write research papers like everyone else attending that class. To the professor’s surprise, Feynman agreed.
Feynman’s first assignment required him to study the nervous system of cats. So he went to the librarian in the biology section and asked her if she could give him a map of the cat.
“A map of the cat, sir?” she asked, horrified. “You mean a zoological chart!”