Aztec Civilisation aztec arrive valley mexico aztecs settled near lake texcoco Tenochtitlan was founded. First temple built Aztecs. tenoch died Acamapichtli becomes first ruler Aztecs. tepanecs defeated formation triple alliance moctezuma started rule Moctezum...

big bang theory is one of the widely accepted theory for the begining of the universe .the universe began to shape 10 ^-6 sec later after the big bang .3 sec later the basic elements were formed .5 billion later the sun was born and 3.8 billion years later ear...