dhw:As for speed, how can anyone know what was feasible? We have nothing to compare it with. ...... For kidneys, livers and nervous systems to function, you require intelligent cooperation between cells and cell communities, regardless of whether God created the intelligence or not. Can anyone think of a more rational explanation?-Before cells cooperate, one needs a good design. Cells cannot create that design. They ony know their own coded job. I would guess there are 20-30 different cell types in a kidney. How do they individually decide what part each plays?