The universe is estimated to be around 13.8 billion years old. This vast timespan is difficult to comprehend, but one way to visualize it is by compressing the entire history of the universe into a single calendar year. In this cosmic calendar, the Big Bang occurs on January 1st, and our solar system forms around September 9th. Life on Earth appears around September 25th, and dinosaurs emerge on December 25th.
Humans don't appear until 11:52 PM on December 31st. This perspective shows how recent human existence is in the grand scheme of the universe's history and highlights the fleeting nature of our presence.
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