The Big Bang

The Big Bang was a massive explosion with hydrogen, nitrogen and oxygen that created the universe. It happened 13.75 billion years ago and consisted of energy converting into subatomic particals like protons, nutrons and electrons. The Big Bang is still happening right now because the universe is still expanding. The big bang was smaller than an atom at first and in a trillionth of a second it exploded really fast, hot and dense. The energy between the subatomic particles was so great and explosion eccured.