Insufficient sleep is an epidemic in modern life. But how long should we optimally sleep? Is biphasic sleep healthy? This podcast addresses issues of optimal length and timing of sleep and the consequences of sleep deprivation. 00:00 Start 00:38 Introduction to this topic 01:23 AASM consensus of sleep duration: What do they recommend for adults? 02:20 And what was this consensus based upon? 05:22 So what about the other end of the spectrum? Too much sleep? 06:39 Sleep in pre-modern times 10:15