Dr. Bierle was doing a presentation on creation and evolution, when a person in the audience asserted that a date for the global flood 4,500 years ago would not allow enough time for the three reproducing couples on the Ark to repopulate to the present population of about eight billion people. Does the Bible’s claim make historical and mathematical sense? (cf. Genesis 7:13)
A replacement rate averaging approximately 1.15 (a fraction over two children for each couple) would be about right to generate our current population or more. The article’s author concluded, “Such a modest rate yields no excuse for scoffers to reject the Genesis Flood by claiming there ‘isn’t enough time’ to repopulate to about eight billion today.” Better wisdom is to embrace Jesus’ statement, “Thy Word is truth” (John 17:17).
Source: “Post-Flood Repopulation from 8 to 8,000,000,000!,” James Johnson. Acts & Facts newsletter, published by the Institute for Creation Research, Vol. 52, No. 5, p. 21.