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1. He said that before the industrial era, nobody slept 8 hours in one block. People slept in two parts: they went to bed after sunset, woke up around midnight, stayed awake for 1–2 hours, then went back to sleep. This “split sleep” was normal for thousands of years. But when factories appeared in the 19th century, society forced everyone into one long sleep window — and the body never fully adapted. He said the modern schedule confuses the brain: it doesn’t understand when it should rest and wh

LOOKING INSIDE THE TIME MACHINE from Back to the Future at Universal Studios Hollywood

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How To Build A Time Machine | Weird Science | Earth Science

How to build a time machine

DIY TIME MACHINE - How To Build A Real Time Machine - 12 Steps