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The Never-Ending Story
Astronomy in al-Andalus

, 253–54 planetary exploration. See space exploration; specific planets plants, 4, 269–70, 295; for dune stabilization, 168, 170, 269; dune vegetation, 131, 149, 270; future climate change and, 297–98; grapevines, 268–69. See also extinctions; life plaster, 240 plate tectonics, 112–13, 179–80, 181, 195, 201; carbon dioxide levels and, 294; climate/ climate change and, 295–96, 297–99; Devonian, 208; extraterrestrial, 292; Moon and, 296; potential future of, 297–98; sediment provenance studies and, 207–8; subduction, 113, 142–43, 194, 298; water and, 296. See also

in Sand

. Clearwater, and Christopher P. McKay (New York: Springer- Verlag, 1991), pp. 105-14. 30. Ibid. 31. Peter Suedfeld, "Groups in Isolation and Confinement: Environments and Experiences," in From Antarctica to Outer Space: Life in Isolation and Confineme P. McKay (New York, Springer-Verlag, 1991), pp. 135-46. 32. D. T. Andersen, C. P. McKay, R. A. Wharton Jr., and J. D. Rummell, "An Antarctic Research Outpost as a Model for Planetary Exploration," jour- nal of the British Interplanetary Society 43 (1990): 499-504. 33. Christopher P. McKay, "Antarctica: Lessons for Mars," in

raft down the Grand Canyon. All were boyhood heroes of Bowman’s. Insofar as most of the world’s places were integrated into the world map by the beginning of the twentieth cen- tury, the frenzy for planetary exploration began to subside, yet the tradition of exploring faraway places survived. When Bowman set off for South America in 1907, he saw himself as a “geographical explorer.”2 This was no simple refusal of the end of an era but an assertion that there remained unexplored or barely explored worlds to conquer, an attempted re- definition of exploration in a

Edinburgh (left), in ig62, the two men discussed Calvin's research. Professor-at-Large Charles H. Townes was awarded the Nobel Prize in physics in 1964 for his role in the invention of the maser and laser. He came to the University in 1967 and is based on the Berkeley campus in the Department of Physics. The new Space Sciences Laboratory, a two-million-dollar home for scientists and advanced students working in such fields as biophysics, atmospheric physics, cosmic-ray study, geomagnetics, and lunar and planetary explorations. The building, completed in 1966 with

Press, Princeton, N.J., 303 pp. Eugene M. Shoemaker (1928–1997), a geologist studying impacts, was a leading figure in NASA’s pro- gram of planetary exploration. 62. The idea that Earth is bombarded from space has a long pedigree; the British astronomer William Herschel (1738–1822) suggested collisions of celestial objects with Earth two centuries ago. More recently, the Canadian geologist Digby McLaren and the marine geologist Robert Dietz of the Navy Electronics Lab in San Diego proposed that large impact struc- tures left a mark on our planet. Dietz, in the 1970s

in Ocean