An ivory toothbrush thought to have belonged to Brazil's Emperor Pedro II and a minty toothpaste made by a European chemist for the Portuguese queen are among more than 200,000 pieces dating from the 17th through 19th centuries that archeologists have unearthed from a site in Rio de Janeiro being used for an extension the city's subway lines ...
http://phys.org/news/2013-09-archeologists-brazil-imperial.htm
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