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This experiment comes from a question sent to me by a subscriber. His question was, "If I were standing directly on the South Pole and I was holding a compass, where would the needle be pointing?"
Lets do this scientifically. Before you read on or try the experiment, think about it. Think about what you know about magnets. Think about how a compass works. Once you have come up with an idea of what you think would happen, then you will be ready to try this.
When you read that 75% of the Earth's surface is covered by water, what does it really mean? The answer goes far beyond just a simple fact. As with many topics in science, the deeper you go, the more you find.
Although we have had several freezes, the leaves here are just starting to change. Every year, the leaves start changing colors in the North first, and then the color change spreads South. This is not due to the temperature. What causes it?