Eureka (word) "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
Cry of the Kalahari other African carnivores. "Cry of the Kalahari" is the personal story of the Owens' encounters with these and a myriad of other animals and depicts their own struggle to live and work in such an inhospitable and unforgiving environment. "Cry of the Kalahari" was a national and international bestseller, translated into seven languages and is the 1985 John Burroughs Medal winner. Cry of the Kalahari Cry of the Kalahari (1984) is an autobiographical book detailing two young American zoologists, Mark and Delia Owens, and their experience studying wildlife in the Kalahari desert in Botswana in the mid-1970s. There they lived