The Big Picture* The man on the radio is speaking of his specialty and passion, theoretical astrophysics. The interviewer frets the big ones, wants to know what is there, on the other side of the end of the universe. Wants to know what it was was then before the Big Bang happened. I’ve heard these questions before; heard my son, at seven, brood over them, though not so much now as when he was five. You try, at some point, to place yourself in the here and now. The astronomer has kept his mind open to these wide questions, the…