[NavVet]

So at some point in the past mammals had internal testicles and through natural Selection they slowly moved to an exterior position for no particular reason. Or did, by some fluke, some early primate just wake up with a pair hanging down and the resulting reproductive advantage led to the human race.

This reminds me of the theory that wings evolved because of the natural advantage that flight gave birds. However, unless one generation of birds emerged with fully functional wings, those many many generations with partially formed non functional wings would have been at a serious disadvantage, and yet we have birds all over the place.

The presence of hiccups no more disproves the existence of God than does the existence of liberals or other religious bigots.

[Rudder]

testicles moved to exterior position for no particular reason.

Except for spermatogenesis, which requires a temperature lower than internal. Back to school for you, budding biologist.

[Soliton]

The presence of hiccups no more disproves the existence of God than does the existence of liberals or other religious bigots.

Calm Down. No one is trying to "disprove the existance of God". No one suggests thet wings formed complete in one step. There is evidence in the fossil record and animals alive today that have vestigal wings unsuitable for flight. Why would God "design" an ostrich with wings if he didn't want it to fly?

[Freedom'sWorthIt]

LOL - well said.

[CarrotAndStick]

This reminds me of the theory that wings evolved because of the natural advantage that flight gave birds. However, unless one generation of birds emerged with fully functional wings, those many many generations with partially formed non functional wings would have been at a serious disadvantage, and yet we have birds all over the place.

Have you seen gliding squirrels? They can't fly, but the bits of skin they have that stretch taut when their limbs are extended, provide enough resistance for safe landings from very high positions.

This feature gives the squirrels amazing advantages, when it comes to escaping predators. The concept could also be extended to swooping down on prey, for carnivorous creatures.

Why can't the same apply to the ancestors of modern birds?