Biblical Timeline

[DragonFox91]

Gen 9:19 "These three were the sons of Noah, and from these the whole earth was populated."

After the flood, the lifespan of people diminished, but the first few generations still lived well over 100 years. Their health was much more robust than ours today, and women had many more child-bearing years. Some could have bore children for 40 or 50 years. Today the average couple has 2.3 children, but back then when DNA was not so degraded, those average couples might have had 23 children. Note the verse says "and from these the whole earth was populated." It means they had lots of children back then.

Makes sense.