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Taking catkind as an example, only two mongrel cats on the ark would contain all the recessive genes necessary for all the diversity to occur which we now see. Some reckon there are 60,000 kinds. The vast majority would be small and capable of living in a small box. The ark at 300x50x30 cubits is an internal space of several x 60,000 boxes. Larger ones for birds and tiny ones for insects. Room for food and human accommodation would all be quite possible especially if we imagine baby larger animals. The authority of the Bible comes first above our imaginings.
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