Who are the world's strongest man and woman?

Answer 1

Mostly, because they are. Male hormones give an extra boost to muscle growth, so more muscle, more strengh. There's plenty of other factors of course: speed of metabolism, general size, a tendancy to want to excercise more on average, really quite a lot of reasons.

Answer 2

The women is Jill Mills the man is Marius Petersons.