Medicine: To Sleep ... to Dream

Everybody knows that he needs sleep, up to about eight hours a night, but not until last week did hardheaded medical scientists report that dreaming is even more essential to health than sleeping. Everybody needs an average of about 1½ dreaming hours, usually spread over six or seven dreams during a night's sleep.

These findings were reported to the American Psychiatric Association at a long evening meeting, before a surprisingly wide-awake audience, by Dr. William Dement, 31, a research fellow in psychiatry at Manhattan's Mount Sinai Hospital. While a member of Physiologist Nathaniel Kleitman's research team at the University of Chicago, Dr....

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