According to the biblical account people lived to be 800 and 900 years
old. This was principally because of the modification of solar energy.
Man’s physical environments impelled long life; and his longevity
diminished immediately after the upper deep fell and the sun began to
pour his beams upon the race; his environment evidently changed with
that event. In a few generations after the flood man died at the age of
120 or 100 years, and finally at three score and ten.