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Colliding Clusters Shed Light on Dark Matter
Scientific American - 2 hours ago
For more than 70 years, astronomers, cosmologists and physicists have known that ordinary matter must be surrounded by vast quantities of an invisible substance--not substantial enough to collide with atoms or stars but massive enough to keep galaxies ...
Dark matter spied in galactic collision Nature.com (subscription)
Existence of dark matter proven in experiment based on ... Newstarget.com
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