Dark Matter Is Not What Scientists Thought — And the Real Answer Is More Disturbing

Dark matter makes up 27% of the universe. After 40 years of searching, we still have no idea what it is. In this video, Leonard Susskind walks through why the original answer — WIMPs, the dominant theory for four decades — has effectively failed. LUX, XENON, PandaX, and the LHC have found nothing across the entire most-predicted parameter space. The WIMP miracle didn't happen. What comes next is more disturbing: axions that behave like waves rather than particles, sterile neutrinos with a tentative detection nobody can confirm, modified gravity that fits rotation curves better than dark matter does, a galaxy discovered with no dark matter at all, and the possibility that dark matter isn't a single particle — but an entire invisible sector of physics with its own forces and chemistry, accessible only through gravity. We know it exists. We know how much of it there is. We know almost nothing else. 🔔 Subscribe for physics that doesn't oversimplify the hard questions. #darkmatter #leonardsusskind #physics #cosmology #universe