It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

Female: At 20 weeks, a female fetus has a fully developed reproductive system, replete with six to seven million eggs. Male: Boys do not produce sperm until puberty, so a male infant's ...

Eggs are a staple ingredient in many dishes ... One popular way to use eggshells is to make fertilizer. The array of minerals ...