Laughter is all very well, but the best medicine is proving to be sufficient restful sleep each night. The same applies to an apple a day. Science shows that the right amount of restorative shut-eye is a more effective way to keep the doctor at bay.
If you harbour any doubt about that, US neuroscientist Mathew Walker dispels it in his best-selling book, Why We Sleep, The New Science of Sleep and Dreams...
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