The catalog, compiled as part of the Sloan Digital Sky Survey, maps the distribution of various elements — including carbon, hydrogen, nitrogen, oxygen, phosphorous and sulfur — across the ...

With these generic background elements in place, let me introduce Christina,* a 19-year-old Caucasian college student who came to see me because she had been struggling with bulimia for the past year.

For example, to create element 117, Shaughnessy's colleagues smashed calcium (atomic number 20) into berkelenium (atomic number 97). "If you add that up you get 117," she says.