Evidence of Humans and Population of the World
The testimony of the Flood has been preserved not only in the rocks and fossils but also in the history and traditions of the entire human race. Practically every ancient nation and tribe in the world has its own flood story, many of them amazingly similar to the biblical account.
The Gap Theory
It is widely known that historical geologists currently think the earth originated about 4.6 billion years ago, whereas the Bible indicates that "in six days the Lord made heaven and earth, the sea, and all that in them is" (Exodus 20:11).
The statistics of human populations give further support to this intimation. Ever since the famous studies of Malthus, it has been known that human populations (applied to animal populations by the first Charles Darwin, in developing his theory of evolution by natural selection) have tended to increase geometrically with time.