How long would it take to populate the earth after creation? Or to re-populate it after the flood? A woman in Israel gives us a illustration of how quickly a family can grow. Rachel Krishevsky died recently at the age of 99. She was married at the age of 18 and had seven sons and four daughters. She was brought up to believe what the Bible says, "children are a gift of the Lord." She taught her children the same principle, and they produced 150 children of their own. Rachel lived to see her great-great grandchildren, and it was estimated she had over 1,400 descendents. One of the grandchildren said of her, "Grandma knew all her descendents."
Rachel is described as a woman who was very generous. She fed the hungry and her door was always open to the homeless. She had memorized the whole book of Psalms. She participated in all family activities up until the last few years of her life.
It doesn't take long for the population of the earth to increase when each family has at least ten children. In fact, if the earth were really millions old years old we would be hugely overpopulated. The population of the earth only makes sense if the earth is thousands of years old, not millions.