God works in mysterious ways. He was able to shrink down existence within the ark to accommodate these millions of animals. An elephant was shrunken down to the size of a pea. BOOM!!! Problem solved!!! There was still room for Noah's bowling alley and stripper pole after all was said and done. God is the man!!!
The guy who wrote it probably knew of a few dozen animal species and was like "they'll have room to spare"!
Where was the vessel registered? British Virgin Islands? Panama? ...
Not just the animals but also their fodder, toilet paper, and tons of deodorant. What about the water?
@Aivery of course not invented but created!