As early as 2.5 billion years ago, the chemical element that constitutes gold in its native form began to emerge in volcanic and sedimentary rock in sources that would later be discovered by humans on every continent on Earth exceptAntarctica, in addition to the gold deposits found deep under the ocean fl oor. Evidence for human exposure to gold dates from around 5000 BC, and it can be said that from this fi rst encounter, humankind cherished gold as a precious symbol of wealth and majesty, thought to contain some aspect of the divine, or even to hold the key to eternal life, because of its unique physical properties and striking beauty. From antiquity to the present day, gold has played a role in the course of human history through its infl uence in a wide variety of realms spiritual, cultural, political, scientifi c, and economic. Access to signifi cant supplies of gold can be credited with contributing to the rise of powerful states and empires. [download]
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