One of my favorite sources for “just so” stories in organic evolution is metamorphosis. Consider: when a caterpillar matures and forms a chrysalis, the caterpillar’s body almost completely dissolves into a yellow mush which then serves as a source for raw materials to reform into a butterfly. I wonder how that scenario came about through mutation and selection. How would destroying almost the entire body and reforming into something that, by morphology alone would be a very different species, come about by Darwinian gradualism? Where’s the selection value in a partially decomposed body? Surely the process could not have evolved in one fell swoop. What series of gradual transitions make sense in light of chance & necessity?