by: Ben Markham
What are white holes?
In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although light and matter can escape from it. In this sense, it is the reverse of a black hole, which can only be entered from the outside and light and matter cannot escape.
When pressure becomes too high, something implodes. White holes implode when the pressure around them becomes too high. They are turned into black holes after approximately 54.34 milliseconds.