The Big Bang event is a physical theory that describes how the universe expanded form an initial state of hight density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. To find out more, checkout wikipedia in the link below:
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