Continuation

Why are robins' eggs that exact shade of blue? Pale, with a hint of yellow. I study two-thirds of one, sitting here on the table under the umbrella next to my laptop, courtesy of J. It's main break is fairly clean, and only one peck whole mars the otherwise intact portion. Its inside is milky white with only a hint of the feathers and bone it encased not long ago.

The girls - J especially - asks me why questions that I confidently answer, alternating between, "God made it that way," and some semi-detailed scientific explanation. I see the answers as the same, after all. At the chemical property level, it is defined that the egg shell will be this shade. But why? It doesn't blend in with the nest very well, so I would think it might make the egg more vulnerable when the mother is not sitting on it.

Maybe the God answer is the only one that works in this case.