Linked: Sleeping Twice

His research found that we didn’t always sleep in one eight hour chunk. We used to sleep in two shorter periods, over a longer range of night. This range was about 12 hours long, and began with a sleep of three to four hours, wakefulness of two to three hours, then sleep again until morning. – SlumberWise

If waking up, getting an idea, writing it down and going back to sleep counts, than I still do this kind of thing.
Interesting article.

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