If you have trouble sleeping, the chances are that you will have tried just about anything to get some quality shut-eye. Cups of chamomile tea, hours of meditation, lavender baths – but sometimes sleep is still elusive even after trying everything you know.Which...
Read moreAssociated with the deepest levels of sleep, delta waves are something of an enigma. First identified in the 1900s neurophysicist William Grey Walter, who was inspired by Hans Berger’s electroencephalograph, or EEG machine which enabled the study of the brain during sleep. ...
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