Dark matter may not be completely 'dark'

The elusive substance could be interacting with itself, massive galaxy collision reveals.
20 April 2015
Presented by Chris Smith


The galaxy cluster Abell 3827. The distribution of dark matter is shown with blue lines.


Druham Universtiy's Richard Massey takes Chris Smith to a galaxy far, far away; or, more accurately, several galaxies over, which also happen to have just collided with each other, providing in the process new insights into one of the Universe's biggest enigmas, dark matter...


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