In the end of the program when they were reading out listener feedback, there was an e-mail from a person who was making a point that dolphins are yet another example of intelligent design: that their echolocation is so technically advanced that there is no way it evolved bit by bit; it must've been created at once, wholly.
So when I got home, I googled, "dolphins intelligent design" - fascinated (and slightly amused) to learn more. I did not need to be disappointed: the results were just that, fascinating and slightly amusing.
"Dolphins breathe using their lungs just like other mammals, which means they cannot breathe in the water like fish. For this reason, they routinely come up to the water's surface to breathe. On the top of their heads is a hole enabling them to do just that. The bodies of dolphins have such a perfect design that, when it dives into the water, this hole is automatically closed by a cap, thus preventing water from leaking into the dolphin's body."
As I was reading it, I couldn't help but think, "Yeah, that's because all the other dolphins whose 'caps' didn't close died and didn't get to procreate."
It then diverted me to another article which made me laugh: oolon.awardspace.com/SMOGGM.htm
- "Terrestrial salamanders, which live their whole lives on the land after hatching, have to return to water to lay their eggs."
- "Conversely, aquatic creatures such as sea turtles, which spend their whole lives at sea, have to struggle out onto land in order to lay their eggs."