Federal scientists have calculated that nearly five million barrels of oil gushed into the Gulf of Mexico from BP’s oil well before BP put in place a temporary cap on the well on July 15. This officially makes it the largest unintentional oil spill in history. Scientists say as many as 62,000 barrels of oil were leaking from the well each day at its peak — that’s more than twelve times as much oil as the government originally projected. BP is planning to attempt to seal the well for good today using a procedure called static kill.