Eureka (word)
The exclamation 'Eureka!' is attributed to the ancient Greek scholar Archimedes. He reportedly proclaimed "Eureka! Eureka!" after he had stepped into a bath and noticed that the water level rose, whereupon he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged. (This relation is "not" what is known as Archimedes' principle—that deals with the "upthrust" experienced by a body immersed in a fluid.) He then realized that the volume of irregular objects could be measured with precision, a previously intractable problem. He is said to have been so eager to share his discovery that he leapt out of his bathtub and ran naked through the streets of Syracuse.
Etruscan civilization
No etymology exists for "Rasna", the Etruscans' name for themselves. The etymology of "Tusci" is based on a beneficiary phrase in the third Iguvine tablet, which is a major source for the Umbrian language. The phrase is "turskum ... nomen", "the Tuscan name", from which a root *Tursci can be reconstructed. A metathesis and a word-initial epenthesis produce "E-trus-ci". A common hypothesis is that *Turs- along with Latin "turris", "tower", come from Greek , "tower." The Tusci were therefore the "people who build towers" or "the tower builders." This venerable etymology is at least as old as Dionysius of Halicarnassus, who said "And there is no reason that the Greeks should not have called them by this name, both from their living in towers and from the name of one of their rulers."