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The Big Bang was a physical event that happened approximitaly 13.8 billion years ago and this event ocurred due to the high tempature and density. -
When the solar system settled in its place billions of years ago the Earth was formed when gravity pulled swriling gas. -
The first forms of life that ever existed on Earth were in the depths of water, were micro organisms also known as bacteria. -
The homo sapians were the first form of modern humans and they evolved from their predecessors around 200,000 or 300,000 years ago -
The earliest humans before homo sapiens were the homo habilis they first appeared around 2.4 to 1.4 million years ago