NASA @NASA
Dark matter, though mysterious & invisible, contains so much it mass it warps space-time. ⚫ Thanks to a phenomenon called gravitational lensing our space telescopes are able to help unravel some of its unknowns. See how: https://t.co/SZF5zAoGyi https://t.co/RY6BI2DG00 — PolitiTweet.org