Since the Washington Post published an op-ed I wrote asking if NSTA's puzzling decision to reject 50,000 free DVDs of Al Gore's global warming documentary An Inconvenient Truth might - just might - have had anything to do with more than six million dollars the organization has accepted from ExxonMobil, Shell Oil, ConocoPhillips and the American Petroleum Institute, the muck keeps piling up.

ExxonMobil, of course,...