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					Originally posted by  KyKy
					 
				 
				Sorry I'm very confused    so dinosaurs were the the first things on earth and then they all died ? And people just appeared out of thin air    
			
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 micro organisms (single celled organisms) were the first "things" on earth. These organisms (Cyanobacteria) were the main producers of oxygen and the reason for diversification of life on earth.
This is just basic. You should know this.
