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UA professor who studies black holes offers free lecture Wednesday

Black holes continue to mystify scientists more than a hundred years after Albert Einstein and others theorized about their existence.

University of Arizona professor Sam Gralla says studying black holes has implications for challenging much of what we know about physics.

“We all dream of changing everything, and you do have to consider ideas that seem a little insane, but you have to find somewhere you can do calculations where you can ultimately make predictions for experiments," he said. "Because experiment is the ultimate arbiter of what is true."

Gralla says the intrigue about black holes was turned up a notch when telescopes produced the first image of one a few years ago. 

"And the question of what a black hole looks like is a little bit complicated because the black hole doesn’t emit anything that’s visible to us," he said. "But of course, if there’s something around it falling in, it makes various displays."

Gralla kicks off the UA College of Science free lecture series this week with “Surprised by Gravity: Black Holes and Their Shocking Implications.” Catch the livestream here at 7 p.m. Wednesday, Feb. 7.

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