Easy Rube Goldberg Machine for Beginners: Track Trigger and Seesaw

How To Build a Rube Goldberg Machine | STEM Lesson Plan

Simple Rube Goldberg Machine setup for Science class

The best way to spread Christmas cheer ... is this mini Buddy the Elf causing happy tears. A little boy with Down syndrome could not contain his joy when he got to meet his favorite festive character in person. #holiday #buddytheelf #elf

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