I believe that Noah was a scientist in a pre known world of high tech ,nology .
At his quest to preserve the lifeforms on earth was an impending disaster , probably an object that they could see heading for earth . So he collected as much DNA of all life he could and with a smaller vessel than an Ark he waited for the impact .
He survived it but most of the earth was disrupted ,
I feel his first contact with humanity again was in the MID-EAST , Egypt , the LEVANT , or the areas within reach of the main remaining megaliths .
As can be viewed on Egyptian stoneworks, the attempts to restore life DNA was confusing because a mix of human , animal life forms are depicted , these as we now know couldn't reproduce .
And so on .
Gianfranco Fronzi . JAN . / 10 / 2016