– Why do testes require low temp for sperm production

Question

I know for a fact that the scrotum temp must be around 34.5°C. Why not lower? Why low temp in the first place and why not high temp?

In: 2

Answer 1

Why not higher, why not lower? On one level the answer is that evolution is random and it fucks up a lot because there is a large element of path dependency to it. Or it creates problems that it then has to solve, so we end up with very kluge like structures that would never look this way if you were designing from scratch. It’s actually the best argument against intelligent design: no one intelligent would have designed this.