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.
Karl Penka
Penka studied anthropology from the point of view of comparative linguistics and took a particular interest in the origins of the Indo-Europeans. He used the term Aryan in the linguistic sense and also extended it into a broad term of race and culture. It was he who popularized the theory that the Aryan race had emerged in Scandinavia and could be identified by the Nordic characteristics of blue eyes and blond hair. In his "Origines Ariacae" ('Origins of the Aryans') of 1883 he proposed that the Indo-European homeland was in the far north, the Hyperborea of antiquity. Penka has been called "a transitional figure between Aryanism and Nordicism".
Penka died in Vienna in 1912. He is now seen as a pioneer of racist and anti-Semitic theories in ethnology.