The Sorry State of Dark Matter Alternatives

Scientists can’t directly observe dark matter, and they still don’t know what it is… so why are they so confident it exists? Hosted by: Reid Reimers For special, curated artifacts of this universe, check out ---------- Support SciShow by becoming a patron on Patreon: ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, D.A. Noe, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Chris Peters ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: ---------- Looking for SciShow elsewhere on the internet? Facebook: Twi