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noble gas
an element that is a gas at room temperature and does not react with other elements under normal circumstances (inert)
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  February 25 in chemistry
  1869 - Phoebus A. T. Levene born (as Fishel Aaronovich Lenin): biochemistry, hexosamines, and stereochemistry.
  1880 - Arthur B. Lamb born: editor of the Journal of the American Chemical Society, 1917-1949.
  1896 - Ida E. Noddack born (as Ida Tacke): co-discoverer of rhenium (Re, element 75) with husband Walter and Otto Berg.
  1908 - Mary L. Petermann born: ribosomes and protein synthesis.
  1925 - Ruth Leroi Benesch born: oxygen-carrying capacity of hemoglobin; role of sulfur in proteins.
   sources: http://webserver.lemoyne.edu/faculty/giunta/week.html, http://todayinsci.com

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