Two of the same poles will repel ... Not every metal is attracted to a magnet. If you have a magnet, try seeing what objects it will attract or repel. Iron fillings reveal a magnet's magnetic ...

There are two types of poles on Earth ... The phenomenon "may be linked to the Earth's history of magnetic pole reversals, which have occurred nearly 200 times over the past 100 million years ...

But as the gelatinous orbs in our skull can perceive only a tiny fraction of the EM spectrum, we have ... one magnet at a time; visualizing complex magnetic fields and more than two poles would ...