The random number generator. Alex maintains that the earth works like a negatively charged object, this is wrong. If this guy thinks the earth's gravity is due to the rubbing together of volcanic material, his ideas are so moronic that I believe a six year old could dispute them. Gravity is a result of the mass of an object, not it's electrical charge. If you think otherwise, you can dispute it with Isaac Newton and centuries of scientific postulates.
Compasses point to north because geographic north is polar south.
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