Where did the materials that make up the Earth and moon come from—and when did they arrive? Most scientific models contend the Earth formed gradually by addition from an assortment of moon- to ...
1. Ten years ago Gannes et al (1997, Stable isotopes in animal ecology:assumptions, caveats, and a call for laboratory experiments. Ecology, 78,1271-1276,1998) identified four major areas requiring ...
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