Fig. 1. Locations of samples returned from the Moon. Model ages of mare deposits [1] were based on superposed crater densities and the Neukum crater chronology [23]. The Moon had a much higher impact ...
In a recent paper, US Geological Survey (USGS) geologists Geoff Ellis and Sarah Gelman estimated large potential for—and large uncertainty about—the amount of hydrogen accumulations in the world. “We ...
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