The fact is that most people who claim that two of all those animals could never had fit into the ark of Noah have two outstanding problems in supporting their argument.
1. They don't know how many animals there were in Noah's day to put on the ark.
2. They have no idea of the size of the ark.
So the argument is it is not believed that a number of animals of which they do not know could not get onto an ark the size of which they do not know.
So therefore they will base what they know on what they don't know.
Without question the Ark was the largest vessel ever floated prior to the building of giant liners of the 19th and 20th centuries.
Because of its square construction it could carry a 3rd more cargo than any modern vessel that equaled it in size and dimension's.
When modern engine room's, cruise quarters, control stations, life boats, saftey belts, cabins, gyms, knife edge bows and rounded sterns are all deducted. An ark of the size set forth in the bible; 562 ft by 93 ft by 63 ft lets say would carry a much greater load than any of these ships with the approx dimensions sailing on the sea's today.
A second factor can be found in the size of the load. This factor is variable as the factor of capacity.
The exact number of animals carried in the ark can never be determined by science. There may have been more kinds of animals living at the time of the great flood. Certain is there could not have been less than living now.
Birds, cattle or creeping things are the only orders mentioned. The others are grouped under the head. Living thing of all flesh.
Under the animal classified clean there were to be 14 (7 pairs) and 1 pair of each unclean animal.
Noah was not under the necessity of finding room for every variety and every specimen of animal and bird alive today.
When we see this, the problem of the Ark is simplified.The specific command is of each kind.
Kind is species and may generally be described as those that can cross breed with fertility. Between any two kind there is a line of demarcation closley drawn and none may cross that line. The living things which can cross breed or hybridise with fertility are all related to that genus or kind and undoubtedly arose from the same parent ancestral stalk.
The many varieties we see today have come by the process of mutation.
Is this evolution?
Evolution is transmutation as long as the mutant or varient or variety under discussion does not cross that line of demarcation and become some other kind it is just development and growth - it is not evolution.
There is a tendancy to variation in every species.
The law of Mendel is based on observation of this process.
A common example of this process we can site is the dahlia (flower).
The dahlia reproduces from a root clump which is erroneously called the bulb which it is not as its name suggests at all. This root clump reproduces true to its type.
If you have red dahlia's in your garden this year and you save the root clumps to plant the following season. From the root clumps of the res dahlia, you would get red dahlia's of that type and variety.
However the dahlia also produces seeds. Whn the seeds are planted from a red dahlia, you may get a dozen different color's of dahlia. None of which will be red.
Of these mutants or varieties, about 2% will fix themselves as a new type and develop a root clump. That is established. Thus new varieties of dahlias are added to the market year to year.
These new dahlia additions remain dahlia's. They don't evolve into onions or potatoes e.c.t.
As long as the dahlia produces new kinds of dahlia and not something else, we are dealing with mutation. When the dahlia from infinate number of changes that is not a dahlia, we will then have a case of transmutation - that would be evolution.
As far as the the records of science go, there is no evidence of transmutation ever occuring one time, one place in history.
The theory of evolution is just that. A 'theory' with no facts to back it up.
If Noah took into his ark a pair of pure strain of every available creature. The varieties would have arisen by process of mutation.
Species are few, varieties are many.
Animals such as ducks and crocodiles would have survived outside the Ark as the water ecosystem provided a sufficient live food base for those alike.
If half the ark had been filled with food and 14 individuals of every true species inhabiting the world were stored in the other half section of the ark. There would have been an average of 175 cubic feet of space for every individual.
A 200 pound man requires only 15 cubic feet space of living quarters.
Noah may not have had to provide space of that accord for every animal.
Noah had 120 years by most estimates to prepare for food provisions.
Although the builder was Noah, the architect was God. The scientific accuracy of the ark is attested by its dimensions. The ancients did not build ships like the 'ark'.
The ark was exactly 6 times long as it was wide. Upon these identical proportions, naval vessels are built today. In the days of the second world war, the pride of the Navy was the USS New Mexico (BB-40) and that great ship was built on the dimensions of Noah's Ark. Same is true with modern aircraft carriers today.
The ancients did not follow this plan. The ancient phoenicians were the fathers of navigation and ship craft and according to records thry built a boat twice as long as its width.
When Rome entered the first punic wars, she had a fleet of 330 vessels. These were built after a plan which varied from a length of 110 feet, with a width of 11 feet to a maximum of 130 feet long to 12 feet wide or a general rule of ten times the width of the length.
None of the ancients seemed to construct on the dimensions of the Ark.
However modern science figured out in time for WWII that the dimensions for ship building given by God to Noah were the ideal for contruction.