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21Nimrod Expedition — Jameson Adams, Frank Wild and Eric Marshall (from left to right) plant the Union jack at their southernmost position, 88° 23′, on 9 January 1909. The photograph was taken by expedition leader Ernest Shackleton. The British Antarctic… …
22Hamilton Library — Infobox Library library name = University of Hawaii at Manoa library location = Honolulu, Hawaii established = num branches = annual circulation = annual circulation = pop served = 60,000 students (University of Hawaii) budget = $14,699,735… …
23BALFOUR DECLARATION — BALFOUR DECLARATION, official statement which arthur james balfour , the British foreign secretary, addressed to Lionel Walter Rothschild (2nd Baron Rothschild) on November, 2, 1917. It conveyed a declaration of sympathy with Jewish Zionist… …
24Convolution — For the usage in formal language theory, see Convolution (computer science). Convolution of two square pulses: the resulting waveform is a triangular pulse. One of the functions (in this case g) is first reflected about τ = 0 and then offset by t …
25World population — estimates from 1800 to 2100, based on UN 2004 projections (red, orange, green) and US Censu …
26dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
27Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
28pre-Columbian civilizations — Introduction the aboriginal American Indian (Mesoamerican Indian) cultures that evolved in Meso America (part of Mexico and Central America) and the Andean region (western South America) prior to Spanish exploration and conquest in the 16th …
29Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
30Antiquity of the World — Antiquity of the World † Catholic Encyclopedia ► Antiquity of the World Various attempts have been made to establish the age of the world. Two groups of scientists have especially busied themselves with this question: physicists and… …
