14 May 2013, 21:40 UTC
You don't have the right version of the adobe flash player to see this video. Please upgrade or install it at "http://get.adobe.com/flashplayer/"Subscribe to iTunes
Silicon-rich rocky material was found around white dwarfs in the Hyades star cluster by the Hubble Space Telescope, despite the fact that almost no known planets exist in star clusters. John Matson...
-- Read more on ScientificAmerican.com