While professional basketball, baseball, and college football have been botching attempts to re-open despite health experts’ advice, women’s roller derby has been putting together a master plan that is so efficient, so scientifically informed, so precise that it’s sexy. Enough for Emory University epidemiologist Zachary Binney, who has been a prominent critic of how other sports are reopening, to confess its spectator policies are so good it “almost made me cry.”