formation earth big bang theory matter was once concentrated giant mass solar system formation central mass concentrated under it's own gravity and created the sun, cloud intestellar dust formed. rest solar system disk shaped cloud susidiary smaller lumps, pie...

spontaneous generation spontaneous generation This was the time Aristotle people believed that simple living organisms could come into being spontaneous generation. This the idea that non-living objects can give rise living things. Francisco Redi Italian physi...