The Royal Road was an ancient highway<span>, part of the Silk Road and the Uttara Path </span>built<span> in ancient South Asia and Central Asia, reorganized and rebuilt by the Persian king Darius the Great (Darius I) of the </span>first<span>(Achaemenid) Persian </span>Empire<span> in the 5th century BCE. Darius </span>built<span> the road to facilitate rapid communication ..</span>
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Explanation:Marie and Pierre Curie found radium in a sample of uraninite in 1898. After the discovery, radium was used to cure many ailments.
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. The most famous of these was the Spanish Dollar, which served as the unofficial national currency of the colonies for much of the 17th and 18th centuries. With its distinctive design and consistent silver content, the Spanish dollar was the most trustworthy coin the colonists knew.
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