Male lactation: Fact of fiction? That's the question on today's Moment of Science.
It's tricky business, but there's a lot you can figure out from a human skeleton if you know what you're doing.
In mammals, the sex of a baby is determined by the chromosomes it inherits from its parents. But, the combination an animal inherits can be quite different.
Sure, there are physical differences but outside of mammals, the terms "male" and "female" take on different meanings.
Medically speaking, it's generally known that when it comes to being pregnant and giving birth, younger is better. Learn more on this Moment of Science.
Fly often? If you do, who gets the arm rest? You? Or your neighbor?
There’s a common belief that men can sire children until they die, but that women need to be relatively young to conceive healthy children. But the father’s age affects the child’s health too.