A biologist walks into a comedy club…

A biologist walks into a comedy club. How does the story end? That stumped Dr. Lee, and he said he would think about it.

A couple of days later, he sent an e-mail message with this response: “A biologist walks into a comedy club. The owner asks, ‘Why’d you select this club?’ Biologist says, ‘Well, it was the natural selection.’ ”

From NyTimes.