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Tangle-web spiders are amazing weight-lifting engineers. They can snag prey 50 times heavier than themselves, like lizards and small mammals, using pulleys of stretchy silk. Spiders weave their own ...

Have you ever seen a flag being raised, or wondered how a mechanical clock works? Let’s take a look at some of the simple mechanisms that they use. Pulleys and gears. When a flag is raised, it will ...