Primordial black holes may flood the universe. Could one hit Earth?

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of “Ask a Spacemanand “Space Radio,” and author of “How to Die in Space.” Sutter contributed this article to’s Expert Voices: Op-Ed & Insights.

Black holes sound pretty scary — dark, powerful, foreboding. And now, astrophysicists have cooked up something else: primordial black holes, forged in the earliest moments of the universe, that flood the present-day cosmos.

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