Word: clock
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Dates: during 1990-1999
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...clock had been 25 hours, than it means every day you're going to correct it an hour," said Richard E. Kronauer, a member of the Harvard-MIT division of health sciences and technology and a senior author of the study...
...taking measurements of body temperature and the body chemical melatonin, the scientists discovered that exposing the subjects to even dim light during nighttime hours can reset the human clock, making it difficult to wake up on time in the morning...
...study, published last week, showed that the body clock regulating sleep runs on a cycle about 24 hours and 11 minutes long--not 25 hours as scientists previously thought...
...clock had been 25 hours, than it means every day you're going to correct it an hour," said Richard E. Kronauer, a member of the Harvard-MIT division of health sciences and technology and a senior author of the study...
...taking measurements of body temperature and the body chemical melatonin, the scientists discovered that exposing the subjects to even dim light during nighttime hours can reset the human clock, making it difficult to wake up on time in the morning...