What a fascinating story this is!
Once upon a time, there was a woman and the woman got pregnant. Since the woman had recently discovered how convenient it is to walk on two legs rather than all fours, she noticed that as her girth increased, her balance changed. Not wanting to give up the two-legged lifestyle she had become accustomed to, her body gradually grew a longer and more flexible spine in order to accommodate the change in her center of gravity. After a few months, her baby was born, and they all lived happily ever after.
Isn’t that the neatest coincidence–isn’t it amazing how that evolved, because it would have to happen during one little ol’ pregnancy? The first woman to go through pregnancy on two legs must have had it rough–she would have been tipping over all the time until that backbone finally got stretched and limbered. But isn’t it nice that eventually her female progeny were born with that trick spine? Why, it’s practically a miracle!
I really wish someone would have been recording all this as it occurred, because this is one step of evolution that had to happen very quickly! It had to have happened within nine months, because after that there would have been no reason for the spine to change.
And while we’re at it, I would have liked to have seen how men developed differently than women in the first place. Because if they all started out as blobs that divided and grew and divided again, at what point did different genders develop? And at what point did it all change to a system where both genders were necessary in order to reproduce? And both genders would have had to evolve to that point at roughly the same time, or the species would have died out. And it seems that asexual reproduction (such as bacteria have) would actually be more efficient, anyway, so why did two genders ever develop in the first place?
So many, many questions…