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Smoky quartz; The smoky colour results from free silicon, formed from the silicon dioxide by natural irradiation.
Early Egyptian name for Alexandria
A hereditary ruling prince in certain feudal states of the Holy Roman Empire and elsewhere; the titular equivalent became known as marquis or marquess
3000 - 600 BC
Date: Bronze Age
Extreme Ultraviolet (EUV)
Electromagnetic Spectrum: 100-10 nm
Conrad IV (Hohenstaufen)
German Monarch: 1237-1254
An abnormally increased distance between two organs or body parts, usually the eyes
One who is fearful and timid, especially in making decisions and plans, in discussions, debates, arguments, and confrontations, and in taking responsibility.
Capital of Tajikistan
Date: Arabian goatherd Kaldi credited with discovery of coffee
Currency of Israel
Any of various diseases of the nervous system characterized by involuntary muscular movements of the face and extremities; St. Vitus's dance