The "Cosmic Year", the best tool to understand remote History

When we talk about dinosaurs , about the history of life in the Land , or of the evolution of man we refer to quantities of time very, very large, so large that it is very difficult for us to understand the dimension that these periods have.That is why I propose you to perform a very interesting exercise that will open your head to interpret the long time in depth.

The best way to understand these figures of such great years was devised by the scientist Carl Sagan. Through book The Dragons of Eden and the television series Cosmos, the so-called " cosmic year" "The exercise is very simple: we compare the evolution of the universe with an o.

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So, what Sagan proposes is to think that on January 1 at 00 hours of the Cosmic Year corresponds to the origin of the universe : the Big Bang (15,000 million years ago).And the last second of December 31 is the current moment.Then, simply what is done is to draw equivalences and date the main moments and historical facts .According to the Cosmic Year , our galaxy -the Via Lactea -arose on May 1 and the Solar System just on September 9.The planet Earth appears a little later, on September 14.Life on the Earth starts on October 2.Something very impressive, since it means that in 3/4 part s of the history of the universe there was no life (or at least not of which we have evidence).

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If the first living organisms-the bacteria- inhabit the planet Earth since the beginning of October, the dinosaurs -for example-appear much later: on December 24.The long time of the dinosaurs (about 160 million years) only lasted from December 24 to 28 of Year Cosmic .Now, the farthest ancestors of the human species just appear in the Sagan Cosmic Calendar on December 31, at 10:30 p.m.The hundreds of thousands of years of evolution of man are reduced to a few minutes from Cosmic Year . hist Oria of humanity (since 3,000 BC) is compressed in just 10 seconds !! This shocking exercise leaves us with an important conclusion: humans only take a few brief moments in the enormous history of life on our planet...and not to mention that of the universe! To think, no...? Sources: Geological time scales, in Kalipedia Cosmic Year, on Wikipedia Images: Cosmic Calendar, on Google Video: Cosmos Series, Carl Sagan

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