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dmfdmf
on Oct 12, 2010
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Terrence Tao: The Cosmic Distance Ladder
"By establishing the relationship of feet to miles, he can grasp and know any distance on earth; by establishing the relationship of miles to light-years, he can know the distances of galaxies." Ayn Rand "Introduction to Objectivist Epistemology"
http://aynrandlexicon.com/lexicon/measurement.html
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