And the UK isn't far behind, averaging just 6 hours and 49 mins a night, meaning that since a study in 1942 found under 8% of the population was trying to survive on six or less hours, it's now rocketed to almost one in two of us.
which is, in his own words, a "manifesto of sleep science".
It's not something people are necessarily recognising as a critical issue when comes to fighting disease and sickness.
And that's partly the fault of people like me: the science has not been communicated well enough."So why aren't we sleeping?
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In my own sleep-deprived state, Walker is disarmingly chirpy to talk to, but resolute about the message of the book: "I think sleep is still a missing piece in the puzzle of people's health.
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