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Eyeglasses are an essential tool for thousands of people across the globe. Unfortunately, glasses didn’t always exist, which caused difficulties for those in the ancient past with poor vision. Read more Section: Artifacts Ancient Technology News Read Later
Posts Tagged ‘eyeglasses’
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Are humans wired to sleep twice a day? The two-phase sleep cycle
May 28th, 2016 
Awake Goy Until recently, most of us just assumed that sleep is a nocturnal activity that naturally occurs in one long block. Today, largely thanks to historian and researcher Roger Ekrich, this long held assumption is being revisited. Ekirch published a study that examined hundreds of diaries, court records, and instructional manuals which demonstrated that, prior […]
