Quantum
In physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. Light, for example, appearing in some respects as a continuous electromagnetic wave, on the submicroscopic level is emitted and absorbed in discrete amounts, or quanta; and for light of a given wavelength, the magnitude of all the quanta emitted or absorbed is
Yamantaka
In northern Buddhism, one of the eight fierce protective deities. See dharmapala.
Atacama
In their widely scattered settlements the Atacama cultivated crops such as corn (maize), beans, quinoa, and squash with the aid of irrigation. They herded llama
Kahanamoku, Duke Paoa
Kahanamoku set
Karakum Canal
Waterway in Turkmenistan. The main section, begun in 1954 and completed in 1967, runs some 520 miles (840 km) from the Amu Darya (river) to Gökdepe, west of Ashgabat, skirting the Karakum Desert. In the 1970s and '80s the canal was extended to the Caspian Sea coast, making the total length 870 miles (1,400 km). Water from the canal, which is navigable for 280 miles (450 km), is used principally for irrigation, and fishing has
Seleucus Iv Philopator
Although the empire that Seleucus inherited was not so great as the one over which his father had ruled before the war with Rome (190–189), it was still large, consisting of Syria (including Cilicia and Palestine), Mesopotamia, Babylonia, and nearer Iran (Media and Persia). Because of financial difficulties,
Colemanite
Borate mineral, hydrated calcium borate (Ca2B6O11×5H2O) that was the principal source of borax until the 1930s. It typically occurs as colourless, brilliant crystals and masses in Tertiary sediments (those formed 66.4 to 1.6 million years ago), where it has been derived from ulexite and borax. The chief localities are the Kramer district, Death Valley, and Daggett, Calif. Colemanite is an
