That's one of the reasons they never find these primordial black holes.

But the existence of primordial black holes has yet to be established.

The third is that they are primordial black holes formed in the big bang.

Anyway, no one knew where the nearest primordial black hole might be hiding.

However, this background could have been, and probably was, generated by processes other than primordial black holes.

If they exist, they are most likely primordial black holes.

But since gravity would draw primordial black holes toward any matter, they should be much more common in and around galaxies.

One way to detect primordial black holes is by their Hawking radiation.

This is why some astronomers are searching for signs of exploding primordial black holes.

However, since primordial black holes are not formed by stellar core collapse, they may be of any size.

This limit means that primordial black holes could make up at most one millionth of the matter in the universe.

Even if they do not yield any positive evidence of primordial black holes, they will be very valuable.

Another way to detect primordial black holes could be by watching for ripples on the surfaces of stars.

But even if we cannot harness the emission from these primordial black holes, what are our chances of observing them?

Yet smaller primordial black holes would emit more than they absorb, and thereby lose mass.

We could look for the gamma rays that the primordial black holes emit during most of their lifetime.

Primordial black hole: A black hole created in the very early universe.

Any primordial black hole in the final stages of decay today would have to weigh about as much as a mountain.

Finally, primordial black holes may have been produced directly from external pressure in the first moments after the Big Bang.

This would imply that the density of primordial black holes is less than 100 million per cubic light-year.

The evaporation of primordial black holes has been suggested as one possible explanation for gamma-ray bursts.

His research interests include the early universe, dark matter, general relativity, primordial black holes, and the anthropic principle.

Primordial black holes could thus account for the creation of any type of black hole.

So if we could determine how many primordial black holes there are now, we would learn a lot about the very early stages of the universe.

"I'm searching for a primordial black hole.