The huge Gulf Oil spill of today also happened in 1979, where oil gushed unchecked for 9 months. One would think oil companies would have learned from that and developed ways of coping with such a gusher. Another giant oil spill happened in the Persian Gulf in 1993. That was said to be a much larger oil spill, but it was kept secret. Click to read more on that spill… This was cleaned up, using methods that are not being used for the current oil spill.