Every object has a Schwarzschild radius, but only if objects are smaller than their own Schwarzschild radius (black holes) it defines an event horizon, i.e. by all means of physics, we cannot “see” what is going on inside.
We are not there yet. Some of the theories put the energy requirements within reach of the LHC. They were at the extremes of possibilities however, and none have been detected so far.
My understanding is that was the ‘fear’ if certain parts of string theory were right and had certain parameters, but it didn’t happen (ruling those out)
TIL. Didn’t consider black holes could be that small.
Technically all objects have an event horizon, the special feature of black holes is just that they are actually smaller than their event horizon
Every object has a Schwarzschild radius, but only if objects are smaller than their own Schwarzschild radius (black holes) it defines an event horizon, i.e. by all means of physics, we cannot “see” what is going on inside.
They supposedly make microscopic ones all the time in particle colliders, but they dissipate almost immediately.
We are not there yet. Some of the theories put the energy requirements within reach of the LHC. They were at the extremes of possibilities however, and none have been detected so far.
My understanding is that was the ‘fear’ if certain parts of string theory were right and had certain parameters, but it didn’t happen (ruling those out)