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Today, the consensus among scientists, astronomers and cosmologists is that the Universe as we know it was created in a massive explosion that not only created the majority of matter, but the physical laws that govern our ever-expanding cosmos. This is known as The Big Bang Theory.
Big Bang Theory The Big Bang is believed to have occurred between 10 and 15 billion years ago. (Most scientists agree that the universe is 13.7 billion years old.) Two elements, hydrogen and helium were created in the primordial fireball, along with small amounts of lithium and beryllium.