Thomas Edison invented the light bulb because he thought sleep was a waste of time. But he was a 10-hour sleeper -- six hours a night and two, two-hour naps during the day.  -   Mark Rosekind     Quotes
Thomas Edison invented the light bulb because he thought sleep was a waste of time. But he was a 10-hour sleeper -- six hours a night and two, two-hour naps during the day. Mark Rosekind
 Sleep