To discuss this topic meaningfully, we necessarily must think in terms of a recent creation. If we are thinking in terms of five billion years of earth's history, about one or two billion years of life's history, and about one or two million years of human history, the study of the world before the flood would be more or less without meaning. One would then have to think in terms of a local flood, and the world before such a flood would be no different from the world after the flood.