About 1-3% of the population needs 5 hours or less of sleep: http://online.wsj.c...

		rayiner on May 15, 2014 \| parent \| context \| favorite \| on: Thomas Edison and the Cult of Sleep Deprivation About 1-3% of the population needs 5 hours or less of sleep: http://online.wsj.com/news/articles/SB1000142405274870371250....