Questions and Answers Questions this site is often asked, each answered on the page where the argument is set out in full. Cain and the people east of Eden Who was Cain's wife? What was the mark of Cain? Were the people Cain met fully human? The long lifespans Are the long lifespans in Genesis literal or symbolic? Why did the first humans live so long? Dating Adam How old is the earth according to the Bible? When was Adam created? The numbers of the exodus How many Israelites left Egypt in the exodus?