Graham Cooper sleeps with his head in a bag. Not just any bag. This one has a hose attached to a motor that slowly lowers the oxygen level to mimic, as faithfully as possible, the agonies of fitful sleep at extreme altitude: headaches, dry mouth, cerebral malaise. "It's not all bad," Cooper insisted, nodding to the humming motor. "That's like white noise." Cooper, 54, an Oakland biotech executive who has handled finance for a number of companies, including one that sold for $7 billion, isn’t a... Read this story
