Weekly History Quiz (3fe05)

Dr. Frederick A. Cook was an arctic explorer and anthropoligist of the early 1900s -- but he's known to history for his hoaxes. Besides claiming to have reached the North Pole in 1908, a year before Peary, Cook claimed to have reached the summit of a famous peak that was the ultimate challenge to North American climbers. A detail detected in his own aerie photograph, which he submitted as proof of his feat, put the lie to his story. What was the mountain in question?