What might be a biological purpose for sperm production to require a temperature less than the normal body temperature?
Male sperm ( Y ) is more harmed by excessive heat than female sperm ( X ).
Some mammals such as elephants & all birds have internal testes.
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Four different types of Round Squares. I've found all of these but I don't know the rule for determining if I've found all the possible combinations. Numerically there could be 6 but I do not think geometrically 6 are possible. I want to know a general formula if such a thing exists.

First attempt at sourdough bread. In 24 hours I'll a fresh baked loaf of homemade whole wheat sourdough bread.

I just discovered a 3rd type of round square. A cylinder is a round square, two cones combined is a round square, the 3rd type is the intersection of a vertical. cylinder and a horizontal cylinder. You can also make is by rounding off the X and the Y of a cube.

Dragons lay their eggs in termite nests. The termites keep the dragon eggs warm and then are food to the hatchlings.

Organically grown 2 lb potato. Only used grass clippings as fertilizer in a potato tower. #organic #garden

Example of a QuickMatch graph for 2 different investment options. The dots above the diagonal line are over satisfied, under the line are undersatisfied, under the horizontal line are unacceptable. The further dot is from the line the more room for innovation.