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Ways of dating fossils

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How did music begin? Did our early ancestors first start by beating things together to create rhythm, or use their voices to sing? What types of instruments did they use? Has music always been important in human society, and if so, why? These are some of the questions explored in a recent Hypothesis and Theory article published in Frontiers in Sociology. The answers reveal that the story of music is, in many ways, the story of humans.
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DK Science: Dating Fossils

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Amazing sedimentary rocks in the Grand Canyon, Arizona. Licensed under Creative Commons. A sedimentary rock is just what it sounds like: it is a rock that consists of sediment! They can consist of sand, clay, chalk and fossils.
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Fossil dating

Biology definition of organism: a living thing that has an organized structure, can react to stimuli, reproduce, grow, adapt, and maintain homeostasis. An organism refers to a living thing that has an organized structure, can react to stimuli , reproduce, grow , adapt, and maintain homeostasis. An organism would, therefore, be any animal , plant , fungus , protist , bacterium , or archaeon on earth.
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Ever since The Enlightenment, and possibly even before that, researchers have attempted to understand the chronology of the world around us, to figure out precisely when each stage in our geological, biological and cultural evolution took place. Even when the only science we had to go on was religious literature and the western world believed the world was created in BC 1 , scholars tried to figure out when each biblical event took place, to define a chronology from savagery to civilization, from creation to the first animal, then to the emergence of the first people. The pre-enlightenment understanding of our geological and cultural history may now be proven wrong and subject to ridicule, but the principles of defining our place in time in the cosmos underpin many sciences.
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