Primordial Black Holes: Ancient Remnants of the Big Bang

Primordial black holes are hypothetical black holes formed in the universe’s first moments.
They could have arisen from extreme density fluctuations just after the Big Bang.
Unlike stellar black holes, they wouldn’t come from dying stars.
Their sizes could range from microscopic specks to thousands of solar masses.
Some might have evaporated over time through Hawking radiation.
Surviving primordial black holes could still drift through the cosmos today.
They’re candidates for explaining some or all of dark matter.
Detecting them would offer direct evidence about conditions in the infant universe.
Microlensing events—temporary brightening of background stars—are one way to search for them.
If proven real, primordial black holes would connect cosmology, quantum physics, and gravity in profound ways.