Article: BLIND PEOPLE'S BRAINS MAY SEE SUNLIGHT, EVEN IF EYES DO NOT

THIS ELECTRONIC VERSION MAY DIFFER SLIGHTLY FROM THE PRINTED VERSION. RESEARCH

Here's a mystery solved: How do some totally blind people fall asleep at the same time each night, even though they cannot tell light from dark? For many blind people, in fact, insomnia is a major problem. About half the time, they have something like jet lag. Their bodies' clocks are way out of sync with the clock on the wall. They toss and turn at night and nod off during the day.

The reason ...

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