CCSS.ELA-LITERACY.RI.9-10.1

Darwin himself wrote of eyes, "The difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, should not be considered [...]

Newborn babies have very immature immune systems, but they aren't completely defenseless against disease. Some antibodies pass from the parent's blood to the fetus' blood during development. But [...]