Shows how little we know.
Beyond the standard model

Also gives an instance of what I recently posted in the Q+A rules forum. So many scientific discoveries begin with unexpected observations. The simple model of hypothesis, experiment, fine tuning & repetition is not how things are often done in the real world of science.

Yes, observations that are not explained by existing models are a great motivator to find new hypotheses! But then the process of testing has to happen, so it is always a necessary part of the story.

Another hint of new physics that may either be confirmed or refuted in the next year or so. Not sure if this particle is a dark matter candidate, but in any case, an unexpected new particle would be fascinating.
http://www.wired.co.uk/news/archive/2015-12/16/cern-large-hadron-collider-discovered-a-new-particle

No new physics beyond the Standard Model. Yet.
http://www.bbc.co.uk/news/science-environment-36990733
(Note this is the refutation mentioned in the last post).
I hear that CERN have found the most substantial evidence yet for physics beyond the standard model. Something to do with leptons not being as similar to each other as they should be with the known forces. But it is a tentative result at present, without the statistical substance that would make it a "discovery".
http://www.rdmag.com/news/2015/08/evidence-suggests-subatomic-particles-could-defy-standard-model
If confirmed, this will be the most significant thing discovered at the LHC, in my opinion (the Higgs boson was confirmation of something which most people accepted existed anyhow, as it explained so much). It may also mean the LHC is not the last particle accelerator (there was fear of a wasteland of energy scales between what the LHC can achieve and the Planck mass).