In the beginning, there was the Big Bang, which flung matter across the universe.
The matter cooled and assembled into hydrogen atoms. Eventually, the hydrogen atoms formed clumps due to their gravity. The clumps grew more massive as they collected material, and the gravitational forces grew larger. Eventually, the hydrogen clumps were compressed so much under their own weight that they heated up and began glowing. They had become stars.
Inside the stars, hydrogen was fused into helium, and occasionally, a larger, more complicated element (such as carbon or oxygen) was formed. The largest stars had a dramatic fate - they blew themselves up in a huge explosion called a supernova. The supernovae were so energetic that they fused lots of complicated atoms together, creating some very large atoms, like gold, lead, or uranium.
In the supernova explosions, the matter was flung back out into space, where it formed clouds called nebulae. The nebulae collapsed again, forming new stars, but, now enriched as they were with heavier elements, also forming planets as well. The heavier elements tended to be concentrated on the planets, so that's where most of the gold atoms are found.
Earth is such a planet.
All the complex atoms (like carbon and oxygen) eventually assembled into amino acids and formed the first living molecules. Billions of years of evolution created successively more complex organisms. Currently, the most complex one we know of is us, humans.
We humans are literally made of star dust, and we dig up another type of star dust, which have named "gold".
"These are some of the things that hydrogen atoms do, given 15 billion years of cosmic evolution." - Carl Sagan
2007-08-06 19:41:36
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answer #1
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answered by lithiumdeuteride 7
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Gold has been known and highly valued since prehistoric times. It may have been the first metal used by humans and was valued for ornamentation and rituals. Egyptian hieroglyphs from as early as 2600 BC describe gold, which king Tushratta of the Mitanni claimed was "more plentiful than dirt" in Egypt.[4] Egypt and Nubia had the resources to make them major gold-producing areas for much of history. Gold is also mentioned several times in the Old Testament, and is included with the gifts of the magi in the first chapters of Matthew New Testament The south-east corner of the Black Sea was famed for its gold. Exploitation is said to date from the time of Midas, and this gold was important in the establishment of what is probably the world's earliest coinage in Lydia between 643 and 630 BC.
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2007-08-06 20:48:25
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answer #2
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answered by Anonymous
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