Exxon digs deep for black gold

Exxon Mobil hopes it won’t be gambling its earmarked $100 billion on looking for oil in all the wrong places. The new head of the world’s biggest oil company, Rex Tillerson, 54, said yesterday the company plans to invest a chunk of its riches on exploration for oil in mostly Africa, Russia and the Gulf of Mexico. The company is under public pressure to increase spending on finding more oil and lower prices following its world-record profits last year of $36.1 billion.