Rare earth magnets for fun and profit

Superball
Rare earth magnets for fun and profit, as the name says is an article about magnets and their uses. Magnetic field viewing film, strength, drive and fluid (ferrofluid) magnets, for almost all tastes in this very interesting link. And don’t forget to read Amazing Magnets Superball kit, a review about that magnet ball that I loved (image above). (Thanks André!)

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