Segmented Sleep. I've slept like this for years and didn't know it was "natural".
"Sleep We Have Lost" - Historical references to humans typically having two shorter periods of sleep instead of one period of sleep. Fascinating!
Segmented Sleep - New York Times. http://www.nytimes.com/2016/04/03/magazine/letter-of-recommendation-segmented-sleep.html
I used to be tired all the time too. 'Segmented sleep' solved that | Peter Papathanasiou | Opinion | The Guardian
Segmented sleep - Wikipedia, the free encyclopedia
The Calming Revelation Of Segmented Sleep
Letter of Recommendation: Segmented Sleep
Letter of Recommendation: Segmented Sleep - The New York Times
Thoughts and Questions from Aramis Thorn: On Leisure Pursuits – Segmented Sleep
Dual Core sleep