On its face, Noah's ark and many things in the bible cannot possibly be true. There is no way possible for some person back in those times to build an ark and put all the animals in the world on it, so they survive a "global flood."
People didn't even travel that far from home back then and would have never ever encountered many of the animals that live all over the world, much less be able to capture them and put them on a boat. You'd think Jesus and his disciples would have mentioned this, if they had all the answers.