The Science of Sleep

I am very interested in everything related to sleep. Not so much because I like to sleep long, but more because I think it has so much impact on our life that I think it is worth trying to understand how it works and how to optimize it.
The report confirms that with less than 7.5h of sleep a day, we do not function properly, and that we actually expose ourselves to premature type 2 diabetes and other problems.
Deep sleep is also very important and the bummer is that we get less of it (even if we sleep as much) as we get older...

The whole report/video from 60 Minutes is here.