Our necks don’t seem able to support the weight of our heads which is fair enough but I’d have thought that by now we’d be a bit more able for it rather than either waking up with a cricked neck, or drooped over ourselves?!
In: Biology
Evolution happens in the opposite way that you’re thinking it does. Creatures don’t grow and develop traits that are advantageous. They have random mutations that cause that particular animal to procreate more than the previous iterations. Eventually either everyone else dies off, or the new version just overtakes the old in population density.
If we lived in a world that suddenly stopped people from being able to sleep properly and people were dying off in droves from sleep deprivation, there may be some people out there who are more resilient in being able to sleep, and their children are the only ones that survive. After a few generations, we all just sleep like that.
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