Answer:
the universe was hot dense state before 15billion years ago and the explosion occur which is the "big bang" and the universe continue to expanding faster than light and begin to cool down it's temperature
Matter was formed when the universe cooled down after it expanded.
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Answer:
the universe was hot dense state before 15billion years ago and the explosion occur which is the "big bang" and the universe continue to expanding faster than light and begin to cool down it's temperature
Matter was formed when the universe cooled down after it expanded.