Was their a world before the creation of Genesis?

So, was there ever dinosaurs inhabiting a earth before the earth that God created? If it was dinosaurs that existed before and fossils to show proof of such an existence, then why wasn't dinosaurs mention in the book of Genesis? It says in the book of Genesis, that God created the first man called Adam; not only he was the first human, he was the first thing on earth, as so mentioned in the book of Genesis. So why is their dinosaurs being mention today and had...throughout history?! Was their ever ape-liked men (called cavemen) before Adam existed? And if the dinosaurs became instinct by an asteroid colliding on earth, then why wasn't it mention in the book of Genesis? Only their was two worlds (as mentioned in the book of Genesis): the creation of Adam and Eve; Cain and Able; ancient societies; Nora--I know that Nora didn't put no dinosaurs in his Ark; it was only mentioned that their was animals--animals of today and not any dinosaurs--that was gathered up into Nora's Ark. Why was their dinosaurs; and if so, was their a 3rd ending (asteroid colliding with earth...riping out the dinosaurs) of a world? Why is their proof of such creatures (which wasn't mention in the bible) had existed by fossil doents?! These are some controversial questions I need to know, and need to be address? Anyone?! Give me your debatable theories and opinions. Thanks.