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The Yata no Kagami represents "wisdom" or "honesty," depending on the source. [2] Its name literally means "The Eight Ata Mirror," a reference to its size. [3] [4] Mirrors in ancient Japan represented truth because they merely reflected what was shown, and were objects of mystique and reverence (being uncommon items).
Its use in mirrors may date back more than 2000 years in China [8] although it could also be an invention of western civilizations. [9] There seem to be references to it by Pliny the Elder. [10] It was certainly in use by the European Middle Ages, giving better reflectivity than the usual bronze, and tarnishing more slowly. However, tin was ...
Many of the structures on these lists were built much earlier than the Middle Ages but were well known throughout the world. [4] [5] Typically representative of such lists are: [3] [4] [6] [7] Catacombs of Kom El Shoqafa, a 2nd-century funerary complex in Alexandria, Egypt. Colosseum, a 1st-century amphitheatre in the centre of the city of Rome ...
In 1970, South Africa produced 995 tonnes or 32 million ounces of gold, two-thirds of the world's production of 47.5 million ounces. [2] Production figures are for primary mine production. In the US, for example, for the year 2011, secondary sources (new and old scrap) exceeded primary production. [3]
According to the World Gold Council, central banks purchased a record 483 tons of gold in the first half of the year. Central banks from Turkey, India, and China topped the list of the biggest buyers.
A discovery of gold reserves, estimated to be worth $83 billion, was made in China last month. China is the world's largest gold producer, Reuters reports.
The mirror of the James Webb Space Telescope is coated with gold because of its ability to reflect infrared light. Optical telescopes typically have used aluminum or silver. Infrared observations can see objects hidden in visible light, such as HUDF-JD2 shown.
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