Who’s your daddy? DNA might not matter

A third of men who take paternity tests end up finding out that they’re not really the father. And just as stricter federal rules are holding baby daddies more accountable, the science of proving paternity is getting cheaper, easier and more reliable. It all combines for some awkward family talks, tough moral decisions and nasty legal battles. We hear from Tanner Pruitt, a father who took an unexpected route to gaining custody of a daughter that isn’t his — not genetically anyway. We also speak to Ruth Padawer, who writes about this in Sunday’s New York Times magazine.