guess my age hint1(my research project):White holes have never been truly observed, but there’s a Y-ray burst from the void, where white holes seem to be the best explanation of it.
A white hole theoretically represents an explosive outpouring of mass and energy. So some cosmologists have speculated that our universe's Big Bang was fundamentally a massive white hole. It is evidence because this can be supporting evidence that a white hole exists.
A White hole isn’t observed, but from a mathematical model of Einstein’s general theory of relativity, Mathematics allows for white holes to exist because there are two solutions to the equations for Einstein’s general theory of relativity. One solution confirms a black hole. However, the second solution produces a white hole. And both solutions are equally correct in mathematics. This is supporting evidence from mathematics, it’s true.