As you might guess from the name, dark matter is quite elusive. Its particles make up about one-quarter of the mass of the universe and as much as 85 percent of all matter. But it apparently does not interact with light or other matter and so it’s never been directly observed. In a webcast Thursday, Nov. 20, three scientists including University of Washington physicist Gray Rybka will discuss how close we are to actually identifying dark matter. They will talk…
November 18, 2014