The Galaxy That Shouldn’t Exist: A Galaxy With Almost No Dark Matter

Scientists discovered a bizarre galaxy that appears to contain almost no dark matter—a substance believed to make up most of the mass in galaxies. So how can a galaxy exist without it? This strange discovery challenges what we thought we knew about how galaxies form, how dark matter shapes the universe, and whether our understanding of gravity is complete. Learn more about your ad choices. Visit megaphone.fm/adchoices