Hi mother Teresa
You take Moses as a historical person because you follow the crowd. If your make an objective reading of first 5 books you will find many reasons to change your beliefs.
You also believe in the second advent of Jesus which the Bible said would happen in the generation of Bible writers themselves: "These things happened to them as examples and were written down as warnings for us, on whom the culmination of the ages has come" (1Cor 10:11)
In fact, this world has no problem, hence no need of ending it. What is really happening is that once this world was new with all the species now extinct, and now this world has become old, just like any tree becoming old in time. Becoming old is not a problem, but is a natural process meant for everything we know. Just like seed-tree-seed mechanism works eternally, the present old world would also become new not in the manner Scriptures describe; but the Supreme Seed, God Almighty would do it in His own way and in His own time. And because He is the Father of all mankind, He will do a perfect and just job giving no reason for anybody to feel unhappy.
What is the guarantee?
look at your own body, it is a living body. What is life? "Life is the principle of self-renewal, it is constantly renewing and remaking and changing." (Boris Pasternak)
If this can happen to our body, the same can happen to the earth, our mother or home whatever you may call it.