Re: Or in this case
Cannot be Antimatter, as we would observe its collisions with normal matter.
I think we would have to do what Newton or Einstein did. Throw out all current understanding, but only temporarily, and start from the bottom up with an observation.
Newton used the observation of an object in motion, and integrated it into the current data.
Einstein used the observation of time/gravity dilatation of Mercury, and integrated it into the current data.
Many others did this with QM and red shift etc. We now need to do it with QM and Gravity, or Expansion and size of the universe etc.