How could Noah possibly get two of every single species that existed in that era onto an ark he built himself?

How many different species is there around the world? Zillions, so... how could Noah get 2 of each and every male/female animal that existed on the planet in that era and fit them onto a boat that he built himself with only months for preparation. Given for all the insects there is, animals that live in different countries around the world like the north/south pole, polar bears penguins, austrailia - kangaroos, koala bears, the many different breeds of animals that exist, like how man breeds of dogs are there that exist now? Did noah travel over each and every centimeter of the earth to make sure he got two of every single breed of species and insect. How did he manage to build a boat which would probably have to be the size of a small country to facilitate all these creatures so that they could be fed, crap, p iss and sleep without these creatures trying to kill one another? How did he manage to stock pile enough food to feed these zillions of species? How could he create an enviroment where it would be clean and sterile so the animals/insects aren't at risk to disease? Did he get two of every human being around the world, asian, arab, white etc? Long story short, this would be impossible to do in this day in age with an army never mind back then when it was only one man. so why do creationists and christians take this story as fact when obviously it's too impossible tto be true?