Humans Used to Sleep in Two Shifts, And Maybe We Should Start It Again

December 26, 2020 ☼ sciencesleep

Source: Science Alert - Link

There appears to be some scientific basis for a split sleeping schedule of 4 hours, 1-3 awake, and another 4 hours. One might be able to do the 6 hours and a nap, or a 4 down, 3 up, 2 down + nap.