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• Autores: Rhoda S. Narins, Michael R. Topp
• Localización: Scientific American, ISSN 0036-8733, Vol. 292, Nº. 2, 2005, págs. 106-106
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • This article offers answers to questions sent in by readers. Why do bags form below our eyes? Dark circles and bags under the eye occur for several reasons: the skin there is much thinner than it is elsewhere on the body and becomes looser as we age. This very thin skin also sits on top of underlying purple muscle and blood vessels and therefore appears darker. How are the abbreviations of the periodic table determined? Although some of the symbols in the periodic table may seem strange, they all make sense given a little background information. For example, the symbol for the element mercury, Hg, comes from the Latin word hydrargyrum, meaning "liquid silver." Many other elements that were known to the ancients also have names derived from Latin.