Scientists first make observations that raise a particular question. In order to explain the observed phenomenon, they develop a number of possible explanations, or hypotheses. This is the inductive part of science, observing and constructing plausible arguments for why an event occurred.
As indicated earlier, the Bible does not fix the age of the earth, contrary to the claims of Answers in Genesis. Historically, their claim comes from the work of James Ussher, Bishop in the Church of Ireland, from 1625 to 1656.
Nevertheless, notice that the full number (400 years) is exactly ten-times that of a regular generation of 40 years. Both 100 years and 40 years are a generation in the Bible. However, the average of these two, 70 years, is on occasion also found in the bible, (Psalm 90:10).But 70 years is a generation according to the average age of a man at his death, rather then when his first child is born (as with the example of Abraham).evertheless, notice that the full number (400 years) is exactly ten-times that of a regular generation of 40 years. Both 100 years and 40 years are a generation in the Bible. However, the average of these two, 70 years, is on occasion also found in the bible, (Psalm 90:10).