4 ms·
Also is well known that segmented sleep was the norm before electricity. https://en.m.wikipedia.org/wiki/Segmented_sleep https://en.m.wikipedia.org/wiki/Segmen
by jfroma 12y ago
Also is well known that segmented sleep was the norm before electricity.
https://en.m.wikipedia.org/wiki/Segmented_sleep https://en.m.wikipedia.org/wiki/Segmented_sleep