Man will never know all that our Creator knows, no matter how long we live, even forever. There is enough right here on our own planet to keep us learning, even forever. Humans have copied God's creations in the airplane, automobile,and other mechanics. Although man has tried to change what God has created, he has never been able to do so and never will be able. All species are of their kinds As far as I have learned, if an animal somehow gets out of its kind, it becomes sterile. I am not a scientist, nor is the Bible a science book. Yet, whenever the Bible says something scientific, it is right on the mark. Although written more than 2500 years ago Isiah 40:22 tells us: "There is One who dwells above the circle of the earth, and its inhabitants are like grasshoppers. Job 26:7 tells us: "He stretches out the northern sky over empty space, Suspending the earth upon nothing;" If the Bible writers were inspired to write these truths about our earth, what other wonderful truths can we learn from the Scriptures? I invite you to the international website, jw.org and Bible Teachings > Bible Questions Answered. If you believe what you learned, you can request your free personal Bible study online or from the next witness who knocks on your door or by visiting your neighborhood Kingdom Hall of Jehovah's Witnesses. There is never a collection taken at any of our Kingdom Halls. Thank you for this question.