Yes. I know. See e.g. http://en.wikipedia.org/wiki/Segmented_sleep I knew that beforehand. That was the reason I wasn't worried when my children woke up at night and crawled into our family bed (some other parents seem to worry.about the quality of their childrens sleep).
But I'm surprised that he actually segmented and that it went this far. I understood that artificial lighting - and we have enough of that - suppresses this segmentation.
I understood that artificial lighting - and we have enough of that - suppresses this segmentation.
Perhaps it is not the light per se, but the fact that when you stay awake at evening, and wake up on alarm clock in the morning, the body learns to give up the segmented sleep to protect itself from the sleep deprivation. Maybe the time interval for your children between going to sleep and having to wake up is large enough.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.