About Noah's ARK

Although some animals went in ark physically, it's possible that Noah collected the DNA samples of each species that are to be preserved n keep them in the ark. From Adam to Noah it was biblical 2k yrs so no reason to think that science although imperfect did not develop to an advance stage where people knew something about DNA especially with the influences of Angelic beings. Whatever science they had was wiped out in the flood and there is no way for Noah to revive all the knowledge after the flood by himself.