Science
In Violation of Einstein, Black Holes Might Have ‘Hair’ – Quanta Magazine
A new study shows that extreme black holes could break the famous “no-hair” theorem, and in a way that we could detect.
Identical twins have nothing on black holes. Twins may grow from the same genetic blueprints, but they can differ in a thousand ways from temperament to hairstyle. Black holes, according to Albert Einsteins theory of gravity, can have just three characteristics mass, spin and charge. If those values are the same for any two black holes, it is impossible to discern one twin from the other. Black holes, they say, have no hair.
In classical general relativity, they would be exactly identical, said…
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