Cycles start together at birth and continue for rest of life. Cycles determine onset of illness and date of death. This is one example of a wide variety of authors of books who attempt to explain prehistory or myths. Here the basic question concerns the Bible. You have stories of flood, manna from heaven, sun standing still, etc.
Stories are common to other cultures.
Publisher turned book over to competitor and fired editor. Comet's tail touched earth, dust and cinders darkened sky, Earth's rotation slowed down or halted, had hurricanes, tidal waves, earthquakes, poles rearranged, earth started rotating in different direction, etc. Earth nudged into larger orbit and time of year lengthens to about 360 days. This theory asserts that this happened during the time of Exodus. Account of plagues in Egypt were caused by this.