Do Men Have a Biological Clock?

What’s fair is fair, right? I mean, if women have biological clocks, shouldn’t men? For centuries, stories have been passed on to admire the seemingly timeless fertility of men. The oldest father documented in the medical literature was George Isaac Hughes. Born in 1840, Mr. Hughes was 94 years young at the time of the birth of his son by his second wife. Much more recent examples include Mick Jagger, whose youngest child was born when he was 73, or George Clooney, who had twins at age 56....