dark matter University of Washington Dark matter may be ‘cold’ not ‘fuzzy’ Scientists have tried to figure out what dark matter is made from for decades. New simulations may bring them closer to an answer. Read Article
early humans University at Buffalo Spit hints ancient humans interbred with ‘ghost’ species Differences in modern saliva genes suggest a "ghost" species of ancient humans interbred with others—and that it may not have been unusual. Read Article
