On Mon, 14 Jul 2003, Mark Tiller wrote: > I seem to remember watching a show that showed long term (several months) > study which deprived the test subjects of any external stimulus as to what > the time was. I believe the famous study was later demonstrated not to show what people thought, or to be procedurally flawed... I doubt the day has lengthened by a second over the last hundred millennia, during which we evolved, or that circadian rhythms are accurate at anything like that level...