If swine flu's origin isn't enough of a mystery for you, here's another: Why did Pfzer's Corey Goodman quit? The SVP was hired 19 months ago to head up Pfizer's biotech center in California; now, he's on his way out, and the company isn't explaining. "We thank Dr. Goodman for his important contributions" and so on--that's all Pfizer will say. Report