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Our planet was created four billion years ago from dust particles and gases floating around the sun, the sun that, to this day, still remains our main source of energy. But there are other sources of energy, including heat, sound, motion, food, and more.
Our planet was created four billion years ago from dust particles and gases floating around the sun, the sun that, to this day, still remains our main source of energy. But there are other sources of energy, including heat, sound, motion, food, and more.