Researchers have doubled their estimates of how much oil has actually been flowing into the Gulf of Mexico from the ruptured oil well that has been spewing oil since April 20th. They now believe that as much as 40,000 barrels (1.7 million gallons) a day may have been escaping for weeks. According to US Geological Survey Director Marcia McNutt, "the lowest estimates that we're seeing, that the scientists think is credible, is probably about 20,000 barrels.