153K views · 8.7K reactions | Dark matter is composed of particles that do not absorb, reflect, or emit light, so dark matter is material that cannot be observed directly. We know that dark matter exists because of the effect it has on objects that we can observe directly. But what is it? Why do we need to study it? Watch and learn more about the mystery of dark matter detection. | Massachusetts Institute of Technology (MIT) | Facebook

103K views · 912 shares | We know a lot about dark matter, but we're still learning. Data from NASA's Hubble Space Telescope isn't in sync with all aspects of the theoretical models about dark matter, suggesting that there's a missing element to the models. Find out how the team learned about it: https://go.nasa.gov/2GHQQao | NASA - National Aeronautics and Space Administration | Facebook

Dark matter makes up a huge portion of our universe, yet we can't seem to find it. | Science Channel