Planet Nine: does it exist?

[Kyng]

While the evidence has continued to mount up, some researchers (including Antranik Sefilian from the University of Cambridge, and Jihad Touma from the American University of Beirut) have come up with an alternative explanation. In The Astronomical Journal, they suggest that these anomalies might be caused not by a 'Planet Nine', but by a vast cloud or belt of smaller objects, which would have the same gravitational effect: 

http://www.sci-news.com/astronomy/massiv...06838.html

It's much less exciting than a whole new planet, but I'm sure there would still be plenty to find and investigate there!