This discovery is a whopper!

In my wildest moments I would NEVER have thought that such a thing would be possible:

http://news.xinhuanet.com/english/2017-06/28/c_136399750.htm

But it seems that  it is not only possible but it is actual.

It means that some how the mass of the galaxy plus the Dark Matter in the area are able to hold these two black holds in a relative position in which they must orbit each other despite they powerful yearning to cannibalize each other.