Why do testicle need to keep cool at an certain, degrees?

Silicon is cut into tiny pieces for computer chipslead is melted to form pelletsliquid water freezes to form ice

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.