Evolution

Partly spurred by the 'pin & thrum' thread, I got to wondering (again) about evolution; now, as far as can be reasonably determined, we as a species have evolved over millions of years into the beings we are now.

We have become upright and lost quite a bit of body hair - and there is bound to be a whole lot more that I can't think of right now.

Mother nature, without doubt, is incredible and for the most part evolution sees species (be they plant, animal or human) improving or at least eliminating some of their weaknesses.

But there are a few evolutionary things that confuse me. For example, sharks have teeth that continually self-replace as they fall out - - why has this evolution not happened for other species?

Also, what evolutionary benefit is there in humans getting (generally) taller? Look at any ye olde building, and you will find low beams and low door frames that the vast majority have to duck under nowadays. And what about things like the size of our feet? I surely can't be alone in noticing that peoples feet are generally getting bigger on average - - particularly so for women? What is that all about?

And why has evolution not sorted out some of the weirder things that happen to us, particularly as we age such as ear, eyebrow and nose hair? Most of the other hair was taken care of after all?

I'm sure there will be many more?