They seem to have disappeared, maybe they've transcended to a new level of being and are now out of communication with the headache-ridden sore-eyed new adaptors of this sleep pattern.
In all seriousness I think this is going to work. I loved the part on how prehistoric man evolved an evasive sleep pattern:
Originally Posted by silicon toad2000
If you're talking 1000's of years of evolution I think you're mistaken. I believe you'll find that the monophasic pattern of sleep is only a modern occurence.
I don't believe for a second that prehistoric man felt safe enough to sleep from sundown to sunup. We sleep in 90ish minute cycles, just like most animals sleep in cycles. Most animals wake up between their cycles, I believe we have conditioned ourselves out of this natural behaviour.
Also, prehistoric mammals often lived in fear of predation by dinosaur. The world had become a dangerous place by day, and there is a correlation of an evolved hearing mechanism called the middle ear would have allowed our distant mammalian hunters to take to the night.
On a side note, I'm on day four and I feel excellent.