Dark Matter Mug

1. Unprovable hypothesis that since galaxies and galactic clusters don't have enough mass to produce enough gravity to spin the way they do, that there thus must be invisible matter hiding that's making it all work. 2. The observation of the universe sometimes fails to follow the known laws of physics, so instead of theorizing that there must be more laws we've yet to discover, scientists have instead decided to push forward the idea that invisible masses must exist, and thus explain away the discrepancies and gaps in our knowledge. 3. Science akin to religion in that nothing at all proves it, but lots of people believe it because it explains something that was hitherto before difficult to understand. 4. Theory regarding matter and gravity that seems to make sense of Newtonian physics when it fails us, but in doing so introduces a concept that is completely ludicrous. 5. Alternative hypothesis to how the universe works to the much more logical MOND theory, or variations thereof. 6. An example of lazy science. 7. The greatest example of how extremely intelligent people can at times be completely clueless, lacking in all common sense.