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.
Europe
In classical Greek mythology, Europa (, "Eurṓpē") is the name of either a Phoenician princess or of a queen of Crete. The name contains the elements εὐρύς ("eurús"), "wide, broad" and ὤψ ("ōps", gen. ὠπός, "ōpós") "eye, face, countenance", hence their composite "Eurṓpē" would mean "wide-gazing" or "broad of aspect". "Broad" has been an epithet of Earth herself in the reconstructed Proto-Indo-European religion and the poetry devoted to it. For the second part compare also the divine attributes of "grey-eyed" Athena (γλαυκῶπις, "glaukōpis") or ox-eyed Hera (βοῶπις, "boōpis").