Some dark matter haloes could roll through the universe like hollow cosmic Easter Eggs
https://www.space.com/the-universe/some-dark-matter-haloes-could-roll-through-the-universe-like-hollow-cosmic-easter-eggs?utm_term=4C6F0460-936C-4BB1-AFC8-763E79682A9A&lrh=b6cf7d1cc5b03d09781df388c8bf94c299849c4284913e9471278585fb3e463f&utm_campaign=58E4DE65-C57F-4CD3-9A5A-609994E2C5A9&utm_medium=email&utm_content=A5B10491-BDA1-4274-9CC4-8D2888DDF04A&utm_source=SmartBrief
