Like many have said it is a cultural thing from experience and observation. Just to bring up some of the older writings on it, we also have the Epic of Gilgamesh and the Epic of Atra-Hasis. We also have the writing on the actual flood survival of Ziusudra.
 gsiamne
                                                
                                                Level 8
                                                Jan 11, 2019
                                            
                                                
                                                    gsiamne
                                                
                                                Level 8
                                                Jan 11, 2019                                            
                                        Because we have so much evidence of Kangaroos, Polar Bears and Penguins hitch hiking to Israel at around about that time, so as to literally not miss the boat.
 LenHazell53
                                                
                                                Level 9
                                                Jan 11, 2019
                                            
                                                
                                                    LenHazell53
                                                
                                                Level 9
                                                Jan 11, 2019                                            
                                        It's all part of the fantasy that must be believed.
 Serenityseeker
                                                
                                                Level 7
                                                Jan 11, 2019
                                            
                                                
                                                    Serenityseeker
                                                
                                                Level 7
                                                Jan 11, 2019                                            
                                        Could say the same for the moon landing deniers, flat earthers, etc.
 TristanNuvo
                                                
                                                Level 8
                                                Jan 11, 2019
                                            
                                                
                                                    TristanNuvo
                                                
                                                Level 8
                                                Jan 11, 2019                                            
                                        The bible says it, I believe it, that settles it.
 jlynn37
                                                
                                                Level 8
                                                Jan 11, 2019
                                            
                                                
                                                    jlynn37
                                                
                                                Level 8
                                                Jan 11, 2019                                            
                                        @John_Tyrrell Yes, you're right, the bible ( Goat-herders Guide to the Galaxy) is 100% accurate when thrown from a distance of 3 feet or less.