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The top documents tagged [naturethe earth]
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Tai County Silicones Co., Ltd
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Radiation occurs in nature…the earth is ‘bathed’ in radiation from a variety of sources. Humans have evolved with these levels of radiation in the environment
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How do We Age the Earth? or ‘Measurement of Environmental Radioactivity’ Paddy Regan Dept. of Physics, University of Surrey, Guildford, UK & Radioactivity
229 views
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Science, The Big Picture, and the Petri Dish David P. Anderson UC Berkeley Space Sciences Lab
217 views