The age-old question of the chicken or the egg is explored through evolutionary biology. Eggs, as membrane-bound containers ...

All the eggs a woman will carry throughout her life form in her ovaries while she's a 4-month-old fetus. A female fetus has approximately 6 million to 7 million oocytes — immature eggs — at 4 months ...

Have you ever wondered why chicken eggs can be different colors? While most eggs are white or brown, they also come in colors like cream, pink, blue and green. In addition — and this is no “yolk” — ...