Scientists have found that a black hole can spin up to maximum speed in finite time, even if it wasn't spinning before. Even more astonishing—such an extreme black hole can emerge literally from nothing, without any initial mass. This breaks the old rule, like a motionless spinning top suddenly whirling to its limit. What else can gravity do?
The third law of black hole mechanics, proposed by Stephen Hawking, forbids a hole from spinning up to its limit in finite time — much like a whirlpool would need an eternity to reach absolute speed. Yet numerical simulations in five dimensions break this rule.
Simulations showed that a non-rotating hole can accelerate to its extreme all by itself. Moreover, such a vortex can spring directly from empty space — with no initial matter at all. It's as if a perfect whirlpool were to suddenly appear in a calm ocean, flouting the laws of hydrodynamics. The discovery shakes the analogy between gravity and heat: rules once thought unshakable lose their grip in higher-dimensional worlds.
🎯 The third law of [tag:black_hole]black hole[/tag] mechanics was born from thermodynamics: there, absolute zero temperature is unreachable in a finite number of steps. For [tag:black_hole]black holes[/tag], extremal rotation corresponds to zero temperature. Now it turns out this threshold can be reached without a long buildup.