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Helium
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1982 Larry Walters using lawn chair and 42 helium balloons, rose to 16,000'
1956 Willem H Keesom, Dutch physicist (Helium I/II), dies at 79 1920 J Norman Lockyer, English physicist (discovered helium in Sun), dies 1908 H Kamerlingh Onnes makes helium liquid (-269 degrees C) 1908 Dutch scientists produce solid helium 1876 Willem H Keesom, physicist, helium vast 1868 Pierre Janssan discovers helium in solar spectrum during eclipse 1853 Heike Kamerlingh Onnes, Dutch physicist, liquid helium, Nobel 1913 1836 Joseph Norman Lockyer, discoverer, Helium, founder, Nature magazine |
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