Scientists Just Found 300 of Some of the Rarest Black Holes in the Universe
created: Feb. 27, 2025, 8:15 p.m. | updated: March 19, 2025, 5:36 p.m.
<p>The discovery more than doubled the number of intermediate-mass black holes we'd seen before.</p>
9 months, 3 weeks ago: Latest Content - Popular Mechanics