How is it possible that you can't see 95% of the universe? The edge of our milky way defies known physics, so physicists are using the LHC at CERN to search for Dark Matter. Dianna Cowern from Physics Girl visited CERN and spoke to theoretical physicists about Dark Matter. Why this stuff costs $2700 Trillion per gram: https://www.youtube.com/watch?v=PCuyCJocJWg (Antimatter at CERN) Creator and Writer - Dianna Cowern Research - Sophia Chen, Imogen Ashford Editor/Videography - Levi Butner Thanks: CERN, Dorota Grabowska, Loic Bommersbach, Sarah Charley, Daniella Bardalez Gagliuffi, Heather Dewis Special thanks to our Sally Ride patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Rishi Dixit. Join the Physics Girl Patreon community! ►► https://www.patreon.com/physicsgirl Sources: Galactic rotation curves: https://arxiv.org/abs/astro-ph/9909252 Searching for Dark Matter with ATLAS (at CERN) https://atlas.cern/updates/atlas-feature/dark-matter The Day the World Didn’t End (NASA) https://science.nasa.gov/science-news/science-at-nasa/2008/10oct_lhc Vera Rubin https://www.annualreviews.org/doi/full/10.1146/annurev-astro-081710-102545 MOND Papers http://adsabs.harvard.edu/full/1983ApJ...270..365M https://arxiv.org/pdf/gr-qc/0506021.pdf https://arxiv.org/pdf/gr-qc/0703060.pdf