> from the dawn of literature in ancient Greece until well into the Industrial Revolution it was customary for us to snooze for a few hours, wake and toddle ar

> from the dawn of literature in ancient Greece until well into the Industrial Revolution it was customary for us to snooze for a few hours, wake and toddle around doing chores in the middle of the night, and then go back to bed until morning. I've read this a few times. I think it may not necessarily be a bad thing that we get all of our sleep in one continuous block. It may have been as vestigial behavior from our ancestors -- fearing predators and other threats. The advent of artificial light has brought lots of benefits but it clearly has some big drawbacks wrt sleep.