The ark story is true but we all have to think of it as an allegory. There actually was a zombie apocalypse and Noah and his family had to build an ark to protect themselves. The ark is also an allegory as it was more of a fort. He called it Fort Ark or F.Ark for short. When the zombies approached the fort he told them to F.Ark off.Because the Biblical story is inaccurate.
It was passed down through many generations
with a process of 'Chinese whispering'.
What I believe is that its origin is still partly true,
and that life on Earth was seeded from another world,
and that the 'Ark' was actually a spaceship.