Our planet earth is very lucky to have the sun, the center of the solar system, at just the right distance. If we get too close to the sun, we will burn. No life is possible. If we are far…
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Better Teeth, Better Health!
Better Teeth, Better Health!
Our planet earth is very lucky to have the sun, the center of the solar system, at just the right distance. If we get too close to the sun, we will burn. No life is possible. If we are far…