According to the history one-year calendar model based on the big bang theory Modern humans first appeared events happened on December 31st.
The big bang is how astronomers give an explanation for the manner the universe commenced. It is the concept that the universe commenced as only a unmarried factor, then multiplied and stretched to develop as big as it's miles proper now—and it's miles nonetheless stretching!
Around 13. 7 billion years ago, the entirety withinside the complete universe became condensed in an infinitesimally small singularity, a factor of countless denseness and heat. Suddenly, an explosive enlargement commenced, ballooning our universe outwards quicker than the velocity of light.
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