What Particles Remain to be Discovered?
The Infinite Monkey Cage
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Dark Matter Outside the Milkyway Galaxy
There is lots of observational evidence that says there's something else out there. We know it's there because of the effect it has on things that we can see. Our milkyway galaxy, for example, keeps its 200 billion stars bound by gravity. But if dark matter wasn't there, then all the stars in our galaxy would simply fly out into the universe. And just like the nutrinos, you don't feel the and very, very rarely, maybe once every four hours or so, there'll be a direct collision between one of those dark matter particles and the stuff that's in your body. They're absolutely doine alind and deceive us.
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