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Do You Know
Questions & Answers on General Knowledge.

Question:
Is the earth a huge magnet? If so, how does it do this without being made out of metal?
Answer:
The earth is a huge magnet and it is made out of metal. The earth's core is mostly iron and nickel, both of which can be magnetic metals. However, the earth's magnetism doesn't appear to come from the metal itself. Current theories attribute the earth's magnetism to movements in and around the core. There are either electric currents associated with this movement or some effects that orient the local magnetization of the metal. I don't think that there is any general consensus on the matter.
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    Protecting bones Change to brown rice

    Calcium requires magnesium as well as vitamin D for maximum absorption. In a study reported in the Journal of the American Geriatrics Society, people over 70 who consumed highest levels of magnesium had greater bone-mineral density than people with the least amount of this mineral. Brown rice contains more than half as much again per serving than white rice. Other good sources include cashew nuts, salmon, soybeans, tofu, and oats.


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