When a stem cell divides, one daughter cell must maintain its stemness while the other specializes. Therein lies another truckload of requirements.
First, they turn evolution into an engineer. Personification is a common ploy by Darwinists.
Two evolutionists make a stunning admission: the human eye is not poorly engineered, after all.
The human knee is still well ahead of what even the most advanced human engineers have managed.
Miller and Luskin discuss fruit flies, finch beaks, stickleback fish, mutational hotspots, phenotypic plasticity, and the gravity well model.