... books overcome the effects of advanced training limit her accounts to historical facts 63 In the passage, the word "others" could best be replaced by which of the following? literary works colleagues ... fluorescent lighting at various times during 24 -hour stretch, research scientists have discovered that the body's natural alarm clock can be reset over a period of two or three days This cuts in ... Dr Charles Czeisler , director of the research team, believes that light has a direct biological effect on the sleep-wake cycle of the body The hypothalamus; the brain's sleep regulator, is connected...