Three Classes of Levers - Examples, Defintion, Classification

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Celebrating December with Last Christmas Cover

My first time in Lagos, Nigeria and I had to visit the barbershop in Makoko 🙏🏼💈 Thank you to @Austin Juten 🤍💎🕊️ for the amazing haircut, please go follow and support this man! Thank you @2cute for making this happen, more to come 💚 #barber #haircut #barbershop #nigeria #lagos

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

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