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unilateral agreement
Clean
November 11, 2011 01:39 AM PST
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electronic

polarization mode dispersion
Explicit
May 02, 2011 11:24 AM PDT
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house dubstep

pokadots
Explicit
February 19, 2011 03:33 PM PST
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explicit

dark matter
Explicit
November 11, 2009 09:32 AM PST
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Dark matter was first hypothesized to exist by the Swiss astrophysicist Fritz Zwicky. In 1933 Zwicky estimated the total amount of mass in a cluster of galaxies, the Coma Cluster, based on the motions of the galaxies near the edge of the cluster. When he compared this mass estimate to one based on the number of galaxies and total brightness of the cluster, he found that there was about 400 times more mass than expected. The gravity of the visible galaxies in the cluster would be far too small for such fast orbits, so something extra was required. dark matter