Two KU professors first discovered [[helium]] in natural gas in 1905 in Bailey Hall, a building which is still used for classes.<ref>[http://www.news.ku.edu/2000/00N/AprNews/Apr7/bailey.html]</ref> | Two KU professors first discovered [[helium]] in natural gas in 1905 in Bailey Hall, a building which is still used for classes.<ref>[http://www.news.ku.edu/2000/00N/AprNews/Apr7/bailey.html]</ref> |