I am very bad at engineering so I'll have to ask you guys for input on this:
Would an ark with the dimensions described in Genesis 6 be big enough to hold two of every animal that existed in those days?
My opinion is that, yes, if a cubit was at least 18 inches, then 300 cubits by 50 by 30, three stories high would have been huge and the Ark would have been large enough for the animals.
However, I do not personally believe that there was a global flood which destroyed all animals and people.
Without considering evolution, there are many reasons for me that the Flood is unlikely, but a few of them go along these lines: Some animals can only live in certain regions and eat certain food. It stretches my reason and experience too far to accept that someone, in those days, could travel to Mauritius to acquire animals peculiar only to that region, and then travel to collect a platypus from Australia. Did Noah take the platypus breeders back to Australia after the flood? And so on. A global flood would silt over all plant life and some animals need trees to feed from, some birds need trees to nest in etc. The ratio of salt water to fresh water on Earth is around 40 to 1 and this will only have changed marginally in the last few thousand years, therefore salt would have contaminated all fresh water and (without evolution) there would be no fresh water fish today (I know the apologetics claim that "science proves" fresh water fish can live in salt water but this is only slightly salted water for a few "kinds" and a ratio of 40:1 - incidentally, "science proves" that the waters were salty a few thousand years BC).
These animals certainly couldn't swim to where Noah lived. And if God was going to use His Power and pick all the animals up and place them right by the Ark for Noah to place in cages (carnivores eat other animals), then God might as well not have bothered about a global flood and just wiped everyone out to leave eight people and breeding animals. But God is not like that: God has set up His laws and His Creation abides by those laws.
It goes on. These are just a few anomalies and a full debate could/would last months - and personally, I do not think God put us here to spend months debating the reality of the Flood, and that He has other things in Mind for His children.
We can assume and assume in order to make it all possible, but I find that assuming and stretching belief is not faith in Christ for me nor does it increase my faith in Christ.
I believe that the mother of the polar bear is 100,000 years old and it has evolved from that time into an Arctic bear today. I have personally seen a cross section of land that shows the present time and also Roman remains from two thousand years ago a few inches deeper - and then Neanderthal remains many, many metres deeper. There's something about seeing things for oneself that makes one accept God's gift of reason and logic as being applicable to the world. I do not believe - and I say with the sincerest respect - that the early teachers had access to, say, meticulous studies of dinosaur remains and so on, and they would have a world view accordingly. But please note: it is the same Christ we love and adore.
It is this reason and logic - as well as what I sincerely believe to be the Holy Spirit - that causes me to believe and have faith that Creation was "precipitated" by the Father through His Christ over aeons of time. It is not a problem for me - in fact, it is so beautiful and super/natural. God's Plan is truly magnificent - it opens up (to me) a little of the truly, truly Beautiful Mind and overseeing loving Heart of a God whose gifts to all of His children are far beyond a human's cognisance - a God who never lets go of His children, no matter how far they have fallen.
I promise that I belittle not believers in the Flood and young Earth, for you I have the highest respect as your belief is firmly grounded and I do understand (eway mol) and thank you for permitting me to be different.Dear Father, I thank Thee for much yet I do not thank Thee enough, for Thy overseeing care, for the Gift of Thyself in Thy Son who is not only my Saviour but the Saviour of all mankind.