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I had never previously doubted the account of Noah’s Ark.Yet, once I started to have doubts about the young age of the earth (https://confessionsofayec.wordpress.com/2011/07/10/the-first-nagging-doubts/), I found that I was now critically analysing key events in the Bible. Specifically, key events that rely on and require a young Earth. Such as the Genesis account of Noah, the ark and a global flood.
Basic Problems with the Global Flood Account
The most obvious issue with the account of the global flood is the volume of water required. There simply is not enough water in our atmosphere to produce enough rain to fill the earth up with water to the height of a mountain. The Genesis account also mentions waters of the deep, which some have interpreted to mean great reservoirs of water below the earths surface opened as a result of earthquakes and water flowed up from them. The problem with this is that it would require huge reserves of water to cover the entire earth, reserves which simply have not been found. Something truly miraculous would be required to cause a global flood.
Then of course there is the issue of the animals. All those animals need feeding and, more importantly, watering. The carnivores would present a specific problem, plus there would have to be very strong and very significant means of separating them apart.
Post flood, there is the very real problem of how to explain that the species of animal are unique to specific parts of the world, the indigenous animals of Australia are the most obvious example.
So the believability of the global flood is found wanting, yet I managed to unquestioningly believe it for many years.
So what of Gilgamesh?
The Epic of Gilgamesh (http://en.wikipedia.org/wiki/Epic_of_Gilgamesh) is a fascinating story, it probably best you follow the link or do your own searches on it rather than me repeat it all here.
The tale predates Noah’s Flood and it is suspected in some circles that the story of Noah’s Flood is a direct retelling of the Gilgamesh story, wrapped up for a different audience and several cultural additions. This is how myths, legends and stories evolve over time anyway.
One of the key moments in me realising that the Flood account was not a real event was a documentary about the Flood, which expanded on some of the evidence I have indicated above. That same documentary drew parallels with the Gilgamesh account and I found myself compelled to question what I had previously accepted as true.
So, now I was not only questioning a young Earth, I was now questioning the validity of the Bible, or at least the validity of a literal interpretation of some Biblical passages.
Recent DNA analysis has shown that Adam and Eve could not have existed (https://confessionsofayec.wordpress.com/2011/06/05/the-problem-of-adam-and-eve/). I would go further and suggest that this evidence also puts into doubt the possibility of Noah and his extended family being at one point in time the only human inhabitants on the planet.