[Rant mode enabled]
There is still no evidence for white holes. Lots of speculation and theories, but no real evidence. Hardly fitting for a headline talking about "experimental spotlight" ... like they are setting up a white hole on a lab bench and poking at it. Yes, they're looking for evidence that the big bang was a white hole ... but it's still just speculation until they find something.
And for a bonus, the story includes my favorite (and widely repeated) misinformation about what's at the center of black holes:
what physicists today call a singularity — a spherical mass shrunken down to an infinitely dense point
This alleged infinitely dense point singularity is most likely a result of an error in General Relativity. There is no evidence for it. Black holes warp space enough that light cannot escape, that much is accepted. But what is at the center of a black hole is unknown.
General Relativity and Quantum Mechanics conflict, the math doesn't work. What is known is that both are wrong or rather incomplete. That the math of General Relativity produces a "singularity" at the center of black holes is just really good evidence that the theory is incomplete and we have no clue what's happening there. It's like proving "1 = 0" ... you know you've got an error someplace. Please do come back after there is a decent 'theory of everything" and try that math again. And if you still get an infinite density you might want to reconsider that new theory.
[Rant mode disabled]
Apologies for flaming, I just get triggered by news stories about unicorns popping out of worm holes because the math allows it.
And Judi -- thanks for your posts! Please don't consider my ranting as a complaint in your direction!