Proof for dark matter?

The researchers have discovered what is effectively the gravitational signature of dark matter.

This signature was created by dark matter and ordinary matter being wrenched apart by the immense collision of two large galaxy clusters.

"The kinetic energy of this collision is...enough to completely evaporate and pulverise planet Earth ten trillion trillion times over," said team member Maxim Markevitch of the Harvard-Smithsonian Center for Astrophysics in Cambridge, US.