PhD Comics presents its take on the process whereby scientists produce original material and then give it away (for free) to a system where other scientists work (for free) to select from those works so they can be published in journals that then charge huge fees to read this freely contributed work.

This is sort of funny, particularly in the way the cartoonist draws the rivalry between the journals Nature and Science. But it's also really serious business, in which peoples' life work gets held for very expensive ransom by an exclusivist system of copyright monopolists. It's one reason I'm a supporter of PLOS, the Public Library of Science.