About 6000 years ago, GOD created every kind of animal. A "kind" is what any 1st grader knows as a kind, such as a cat, dog, finch, bacteria, whale, bat, etc. When the world was created, there was a layer of water above the atmosphere (like Saturn's rings, except liquid and everywhere). This layer of water doubled the barometric pressure on earth, and oxygen was much more abundant on earth. Thus, and because there were no genetic anomalies, all organisms lived about eight times longer than today. Because reptiles keep growing all of their lives, some grew as big as, well...dinosaurs! Yes, the dinosaurs never died off; they were just old (and therefore big) reptiles. Of course, the humans were also quite big, around 11 to 14 feet tall.