The Colbert Report interviewed Ted Daeschler, one of the paleontologist discoverers of the fish-tetrapod missing link. As viewers realize, Colbert is an insightful interviewer who doesn’t take kindly to quackery and other wishful thinking such as evolution. So he asked the guy to explain ‘evolution’ in simple terms, and the response was “sex and time”. Such an eloquent explanation. Short, sweet and succint.

If you want to see the video, you will probably need to search the video archives for Daeschler.