Bama Links: Preview, The Podcast, FFFF Offense (chart), FFFF Defense (chart). Primer on Alabama switch D. Something's been missing from Michigan gamedays since the free programs ceased being economically viable: scientific gameday predictions that are not at all preordained by the strictures of a column in which one writer takes a positive tack and the other a negative one… something like Punt-Counterpunt. PUNT By Bryan MacKenzie@Bry Mac If you hang out in Michigan Internet circles long enough, you’ll come to the conclusion that everyone has a favorite random astrophysics fact. The kind of thing you’ll throw out at parties or social gatherings with the slightest provocation. Things like “the observable Universe is 93 billion light years across despite being only 13.7 billion years old” or “the atmosphere of a neutron star is 4 inches high” or “because of gravitational lensing we once watched the same supernova four times over the course of several months.” Now, s