Today I learned that I'm normal, or normal for another time, or more normal than most. Courtesy o' Blogfaddah Lex, this (The myth of the eight-hour sleep):
In the early 1990s, psychiatrist Thomas Wehr conducted an experiment in which a group of people were plunged into darkness for 14 hours every day for a month.
It took some time for their sleep to regulate but by the fourth week the subjects had settled into a very distinct sleeping pattern. They slept first for four hours, then woke for one or two hours before falling into a second four-hour sleep.
Though sleep scientists were impressed by the study, among the general public the idea that we must sleep for eight consecutive hours persists.
I gave up worrying about my sleep habits some time ago, accepting the fact that I sleep in shifts to be somewhat normal for a man of a certain age and station in life. That said, it IS a right-royal PITA when your day begins sometime around noon (on most days) and you go directly from your "morning" coffee to Happy Hour.