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Incredible "Ball Clock"! Use a small ball to tell time. Do you know the principle?
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They say diamonds are forever, but they can be burned and broken.
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Why does steel need to be rolled repeatedly? #Science #Unzip #Rolling #Forging
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Super splits
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Why do honey collectors only harvest a small portion of the hive when harvesting honey at high altit
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Savings: No knife
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Why do we need to stretch the syrup repeatedly when making handmade candies? This step is actually c
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What modifications can be made to an excavator? #PopularScience #Unzip #LargeMachinery #Excavator
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Are the videos we watched fake? Has wild sex education been fooling us all these years?
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Why do two people need to swing the hammer when forging iron? #Science #Unzip #Ironmaking #Forging #
Why doesn't it hurt when a needle is stuck in my finger?
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The mysterious man setting up a street stall
Can humans use current technology to eliminate the creature Kaz?
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[No nonsense] Why do people who work in a vault have to wear iron shoes?
Why are the joints of steel cables so strong? #Science #Unzip #SteelCable #MachineryManufacturing #E
Why should you clean your car's exhaust pipe? #Science #Unzip #Car #Cleaning #Trivia
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Why can loose sand be made into sand sculptures after mixing with water?
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Why can rice be eaten raw, but wheat is always ground into flour? [Food Records]
Why do we cut off a circle of the knife when forging it? #Science #Unzip #Forging #Forging
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90% of people have experienced these three types of blisters—today, one video will teach you how to