Black holes may be swallowing invisible matter that slows the movement of stars
![Black holes may be swallowing invisible matter that slows the movement of stars](https://cdn.mos.cms.futurecdn.net/6biHAnpErc3sXUdneBuUcn.jpg)
Scientists watched as two stars slowed in their orbits around black holes, concluding it was the result of "drag" generated by dark matter.
Scientists watched as two stars slowed in their orbits around black holes, concluding it was the result of "drag" generated by dark matter.