43K views · 62 reactions | Happy 28th birthday, Hubble! https://nbcnews.to/2KaVlHZ | NBC News Science | 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