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The Philadelphia robot Factory is dedicated to exploring the strange behavior of magnetism in its many forms. Sometimes we also blow up elemental sodium to let off steam. Be sure to check out our sodium video playlist if you like explosions. Magnetism is 10^40 (10,000,000,000,000,000,000,000,000,000,000,000,000,000) times stronger than gravity. This is why a small magnet will cling to a refrigerator even with the Earth’s gravity (1 g) pulling it straight down. Unlike gravity which only attracts, magnets have two poles. No matter what shape a magnet is, its north pole will repel all other north poles, and attract all south poles. Both poles will attract ferrous metal such as steel. The strongest magnets are made from an alloy of neodymium, iron, and boron. They are usually plated in nickel and referred to as neodymium magnets. Neodymium magnets are eighteen times stronger than common ferrite refrigerator magnets allowing intricately designed magnetic sculptures to be built. ~~~

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