ani87

> but then what's the advantage for women to have a higher pitched voice?

Living in a neighborhood with a lot of teenagers, I will dare a guess; this loud, high pitched scream was probably a very efficient call for help.

But I see your point, and I agree that the answer could be just as simple as randomness of genetics. It just feels rather unsatisfactory for a change who must have taken far more than one single mutation to be that common. Feels like someone winning the lottery a dozen times in a row.

> Warrener and her colleagues found that wider hips do not increase the cost of locomotion. Indeed, both women and men are equally efficient at walking and running

> I have a number of papers that show that women are great walkers, and in some particular tasks women are better—they don’t use as much energy, they don’t build as much heat, they can carry heavier loads with less of an energetic burden.

I am not a biologist, but those parts just don't click for me; how/why would evolution have jump through all the costly hoops to differentiate the pelvis of males and females so significantly if the result was to give a locomotion system that was overall worse to the individuals who needed it the most for their survival, without any benefit in return ?