XPost: alt.home.repair, sci.electronics.design, uk.d-i-y   
   From: tsruhf@gmail.com   
      
   On Wed, 23 Nov 2022 04:04:26 +1100, Chris Green  wrote:   
      
   > Commander Kinsey  wrote:   
   >>   
   >> > Birds manage with internal testes.   
   >>   
   >> I was always told our testes needed to be 36C, not 37C like inside us.   
   >> Yet a bird is 40C body temperature.   
   >   
   > Yes, but why do they need to be a bit cooler than our body   
   > temperature? Wouldn't it make much more sense in evolutionary terms   
   > for them to work properly at body temperature?   
      
   Maybe that is easier said than done with the higher mammals.   
      
   There has to be a reason that it is so common.   
      
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