time is differently from region to region
you can take early egypt
sun clocks and knowledge of positions stars
european region
stone edge agriculture time
chinees region
they have another progress much early'r
american region
maya calander
they all come to the surface in different times
it is not all develloped in one human time
the reason is simple
the population spread and devellopment 'luck'
now satellites bring people world wide connected in the same time
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