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String Theory Meets Loop Quantum Gravity
...requiring a black hole to let information escape would destroy the delicate structure of empty space around the black hole’s horizon, thereby creating a highly energetic barrier — a black...
The Most Famous Paradox in Physics Nears Its End
...how paradoxical black holes really are. His first studies of black holes, when he was a graduate student in the ’70s, were key to his adviser Stephen Hawking’s realization that...
Paradoxical Crystal Baffles Physicists
...Lifshitz-Kosevich formula was presaged in 2010 by Sean Hartnoll and Diego Hofman, both then at Harvard University, in a paper that recast strongly correlated materials as higher-dimensional black holes, those...
An Astrophysicist Who Maps the Universe’s Terra Incognita
...reactor — these black holes. So black holes are compact inner parts of the stars that have gravitationally collapsed and have become unbelievably dense. There’s no analogue. It’s not lead;...
The ‘Beautiful Confusion’ of the First Billion Years Comes Into View
...filled with black holes formed in this way. But cosmologists have struggled to understand supermassive black holes. These black holes somehow grew large enough, and fast enough, to shape the...
Interactive: What Is Space?
...of space-time, overturning Isaac Newton’s classic theory and correctly predicting the existence of black holes and gravity’s ability to bend light. But a century later, the fundamental nature of space-time...
A Glimpse Through a Cosmic Keyhole
...galaxies, meaning that they have jets of material streaming out in two directions, probably powered by the supermassive black holes spinning at the galaxies’ centers. (The jets emit radio light...
An Enormous Gravity ‘Hum’ Moves Through the Universe
...black holes get relatively close to each other? There were reasons to think that instead of merging, as smaller black holes do, supermassive black holes just rotate around each other...
Early Life in Death Valley
Paul Knauth scrambled up a steep, rocky canyon in the Black Mountains of Death Valley National Park, sporting gloves and a walking stick to help navigate the sharp scree. The...