Ted Talks: Sleep and Circadian Rhythm with video

Click on link below to see Ted talk by Jesse Gamble, on sleep and circadian rhythms:
http://www.ted.com/talks/jessa_gamble_how_to_sleep.html

The far-reaching, free exchange of ideas known as TED takes on sleep and circadian rhythms in the latest streaming TEDtalk.
In the video, environmental journalist Jessa Gamble shares some things she picked up while living in the 24-hour darkness of northern Canada in the wintertime.
Gamble praises the benefits of setting an early bedtime, and waking for a couple hours in the middle of the night, before sleeping until sunrise.
The speaker's approach to sleep isn't all that different from the split sleep schedules used by astronauts and shift workers. The concept is called biphasic sleep, and research shows it can be just as effective as normal nighttime sleep.