White holes are returning to the experimental spotlight.
Black holes, the most famous singularities, are regions of space so warped that no exits exist. The outside universe can influence the inside of a black hole's horizon, but the interior can't affect the exterior. extended Schwarzchild's black hole description in 1960 to cover all domains of space and time, his new picture contained a reflection of the black hole singularity, although he didn't realized its significance at the time.
"It took 40 years to understand black holes, and it's only recently that people have been focusing on white holes," Rovelli said.While general relativity describes white holes in theory, no one knows how one might actually form. A black hole cordons off its bit of space when a star collapses into a tiny volume, but playing this video backwards doesn't make physical sense.
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