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Gold has held an
for thousands of years. This
metal is a symbol of
and wealth. Scientists have discovered how it stays in such
condition and never loses its
. Researchers in New Orleans found that gold does not rust or change colour because of the
of atoms on its surface. A researcher said the
naturally rearrange themselves into unique
patterns. This minimizes reactions with
. As a result, the metal does not become discoloured, even after centuries of exposure to the
.
