Dark Matter Hunters Pivot After Years of Failed Searches
Physicists are remarkably frank: they don\u2019t know what dark matter is made of. \u201cWe\u2019re all scratching our heads,\u201d says physicist Reina Maruyama of Yale University. \u201cThe gut feeling is that 80 percent of it is one thing, and 20 percent of it is something else,\u201d says physicist Gray Rybka of the University of Washington. Why does he think this? It\u2019s not because of science. \u201cIt\u2019s a folk wisdom,\u201d he says.