The researchers measured nighttime light levels in the bedrooms of 863 elderly Japanese adults by placing ceiling-facing light meters at the heads of everyone’s beds for two nights, to approximate as accurately as possible the light they would see while going to sleep. People who saw more than five lux of light at night were much more likely to develop symptoms of depression than those who slept in a completely dark room.
reading scienceThese twenty video lectures by Hal Abelson and Gerald Jay Sussman are a complete presentation of the course, given in July 1986 for Hewlett-Packard employees, and professionally produced by Hewlett-Packard Television. The videos have been used extensively in corporate training at Hewlett-Packard and other companies, as well as at several universities and in MIT short courses for industry.
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video design cool interesting scienceA set of four priceless archival video recordings from the University of Auckland of the outstanding Nobel prize-winning physicist Richard Feynman - arguably the greatest science lecturer ever.
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