We have retold 2 papers by this author. most often about: baryon acoustic oscillations, primordial black hole, axion. 4 co-authors across our retellings.
In its infancy, the universe was a hot, plasma-like mixture of particles. Microseconds after the Big Bang, as it cooled, the temperature fluctuated slightly.
In the first moments after the Big Bang, the universe underwent a rapid expansion — inflation. Like a balloon inflated not uniformly but with tiny pulsations, it stretched billions of times over a fraction of a second. These pulsations froze into density ripples, from which galaxies later grew.