Just expand on the current one.

God made humans, in his image, because God is a jealous God and wouldn't want humans to be better looking than himself. He filled the world with animals for the humans to hug and eat. On the seventh day He rested.

On the either day, he started on some new planets, then on the ninth day He populated them with more life so that humans might expand to fill the universe he created, and find the life he scattered around for the humans to hug and eat. On the tenth day, he created intelligent life on other planets, because he is all knowing and therefore knows humans won't feel true camaraderie without attacking and wiping out other sentient life forms. On the eleventh day, He declared a public holiday, because He felt like resting but he already decided the Sabbath is every 7 days.

The bible was written by a bunch of religious scholars, and assembled into a series of books. There's no reason they can't "discover" some more books.