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Human Beings (Home Sapiens) first appeared on Earth (in Africa) about 300,000 years ago. This had been preceded by the birth of our Universe about fourteen billion years ago, and by the birth of our Solar System about five billion years ago. The diameter today of our Universe is estimated to be at least 156–554 billion light-years (one light year = 5.879 trillion miles) in size. Our Earth with a diameter of about 8,000 miles, is infinitely small within our Universe – relatively speaking, le...