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language and thought cognitive linguistics multilinguals’ view of nature hopi time number vocabulary snow words berinmo color perception dani language color words sapir whorf hypothesis linguistic relativity nasa pi day challenge pi day challenge spacescience engineers scientists rocket science nasa resume resume writing cv newton laws of motion einstein astronomers orbital motion general theory of relativity special relativity galileo gravity ancient astronomers history of astronomy stonehenge modern astronomy archaeoastronomy astrology tycho the observer kepler the analyst the astronomy of greece the moon cycle moon orbits moon phases crescent moon solar eclipses monthly lunar cycles lunar phases total lunar eclipses the brightness of stars the cycles of the sun the sky celestial sphere constellations and stars the names of the stars the moving planets the motion of the planets linguistics language etymology