Charles Darwin knew there was a lot that was special about pigeons, and a lot that was common. Perhaps that’s why he used them to introduce the world to his new theory of evolution by means of natural selection.

This is an installment of the PBS – It’s OK to be Smart series. If no film or link appears in this email, go to the blog to view it by clicking on the blog title above. If the film stops & starts in an annoying manner, press pause (lower left double bars ||) to let it buffer and get ahead of you.  [Chuck Almdale]