On today’s ID The Future out of the vault, host Robert Crowther welcomes philosopher of science Paul Nelson to explore an intriguing tension in the thinking of famous scientist and science popularizer Carl Sagan. Though Sagan was a committed Darwinist and agnostic, he embraced certain ideas consistent with the theory of intelligent design. Could Sagan's methods for detecting extra-terrestrial intelligence be used to make design inferences in the natural world? Listen in as Dr. Nelson discusses this intriguing idea.