data-mm-id=”_dec1bcv71″>The Big Ten is no longer a collection of dust from three-yard gains. All manner of newfangled offensive schemes have come and gone and the scoreboards have reflected a more uptempo, freewheeling game. And yet, deep down in the soul of everyone from Cedar Rapids to Happy Valley who is of a certain age, there's a certain nostalgia for steel-curtain defense on sun-starved and frozen brown fields. The ship has arrived for that sect of fans. The nation's four top scoring defenses reside in the conference. Wisconsin is holding opponents to 7.3 points/game while Penn State is just behind at 7.5. Iowa is at 8.5 and Ohio State at 8.6. It's beautiful. Michigan State, which may have the most fearsome unit of all, is 14th at 15.0. The Spartans join Wisconsin,…