Peruse the egg section of a grocery store or farmers market, and you'll notice cartons of eggs separated into white and brown, sometimes even green or blue eggs. But once they arrive scrambled on a plate with cheese and tomatoes, perhaps, or baked into a cake, it's tough to tell the difference. In fact, do chicken egg colors mean anything at all?

This isn't a flour or rice situation: Brown eggs are not more "natural," and white eggs have not been decolored with bleach. Both varieties occur completely naturally, as do bluish-green chicken eggs.

But really, all chicken eggs are the same on the inside. So what causes different egg colors among the same type of bird?

Why Are There Different Colored Eggs?

Dr. Justin Fowler (which came first, the surname or the profession?), a professor

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