Bible Teachings - This Timeline Chart of the generations of the faithful to God from Adam to Abraham shows the chronology of the first 20 generations of the Patriarchs of the Bible. The Lifespan of the Biblical Patriarchs before the flood was considerably longer than that of those after the flood - ConformingToJesus.com
Luke 17:26 that "As in the days of Noah, so shall the days of the coming of the Son of Man be. People were eating, drinking, marrying and being given in marriage up to the day Noah entered the ark. Then the flood came and destroyed them all."