Building the Ark with the technology, man power and resources they have is impossible.
Getting all the animals is impossible
Getting all the parasites, diseases, infections etc is impossible
Getting all these creatures on the ark is impossible
Getting enough water that would cover the entire earth is impossible due to the fact that all the creatures not on the ark would be crushed.
Treking around the waters maintaining every animals and maintainence of the ship with less than a dozen people is impossible.
Getting the creatures off the ship and putting them back into their habitat is impossible.
And those are just the generalistic ones.
Getting all the animals is impossible
Getting all the parasites, diseases, infections etc is impossible
Getting all these creatures on the ark is impossible
Getting enough water that would cover the entire earth is impossible due to the fact that all the creatures not on the ark would be crushed.
Treking around the waters maintaining every animals and maintainence of the ship with less than a dozen people is impossible.
Getting the creatures off the ship and putting them back into their habitat is impossible.
And those are just the generalistic ones.