A cosmic riddle: medium-sized black holes are the missing link. They are nearly unseen, but radio bursts revealed two 'invisible' objects weighing thousands of Suns. If these are clumps of dark matter, our picture of the universe will be flipped.
🎯 A fast radio burst unleashes more energy in a millisecond than the Sun does in a week.
🎬 In sci-fi, primordial black holes are portals to other universes. But their real role may be humbler: invisible bricks of our cosmos.