On 2 May 2014 at 3:11, Phil Pugliese (via tml list) wrote:

> p.s. I worked 'graveyard' for almost 30 years. As a result it's much
> harder for me to sleep at night than during the day but I rarely
> sleep more than 4-5 hours at once (sometimes only three). But I do
> find that I need more than that much sleep in a 24 hour period.
> Hence there's almost always more than than one 'sleeping cycle' per
> 24 hour period.

Actually, human sleeping cycles before artificial light (decent
light) was two sleeping periods a night with a period of activity in
between.

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com