How the animals became so widely distributed over the Earth, once they disembarked from the ark after the Flood, is not explained in the Genesis account. Whitcomb and Morris offered some viable suggestions in The Genesis Flood (1961, pp. 79-86). Migrations may have taken place by land bridges, by air, or even by the direct supernatural intervention of God Himself. Other possibilities also exist. For example, perhaps after the Flood those animals that came off the ark lived around the mountains of Ararat, where they were able to “breed abundantly in the earth, and multiply upon the earth” (Genesis 8:17). Theirdescendants then migrated slowly, generation by generation, until the Earth once again was filled with animal life. Critics often are heard to ask questions such as, “How did the unique animals like marsupials get back to Australia, for example?” [NOTE: For a discussion of this topic, see Major, 1989.] There is a significant assumption in such a question, however. Who can prove that the marsupials were in Australia before the Flood in the first place? Some pieces of information we do possess; some we do not. We do know, for example, that a certain number of every kind of air-breathing animal entered the ark. We know that representatives of each exited the ark. And we know that the survivors bred and multiplied, filling the Earth once more with animal life. Exactly how they migrated (or were distributed) to various parts of the Earth, how long that took, or why some animals later became extinct, we cannot determine conclusively. These are questions that will have to remain unanswered, but do not affect the authenticity of the Bible.