What does the age of the Earth have to do with the exodus of young people from American churches? Ken Ham, known for his Answers in Genesis creation-science ministry, says a major study he commissioned by a respected researcher unveils for the first time in a scientific fashion the startling reasons behind statistics that show two-thirds of young people in evangelical churches will leave when they move into their 20s. The study, highlighted in Ham's new book with researcher Britt Beemer, "Already Gone: Why your kids will quit church and what you can do to stop it," finds church youth...