external In the Media June 29, 2021 Nikodem Poplawski, senior lecturer of physics, comments on the idea that dark matter is composed of primordial black holes. https://dailygalaxy.com/2021/06/the-weird-existence-of-primordial-black-holes-in-the-early-universe-harvard-smithsonian-center-for-a/ news-all news-in-the-media year-2021 month-june