QUANTUM MECHANICS

New Quantum Paradox Clarifies Where Our Views of Reality Go Wrong

By ANIL ANANTHASWAMY

A thought experiment has shaken up the world of quantum foundations, forcing physicists to clarify how various quantum interpretations (such as many-worlds and the Copenhagen interpretation) abandon seemingly sensible assumptions about reality.

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QUANTUM MECHANICS

Why the Many-Worlds Interpretation Has Many Problems

By PHILIP BALL

The idea that the universe splits into multiple realities with every measurement has become an increasingly popular proposed solution to the mysteries of quantum mechanics. But this “many-worlds interpretation” is incoherent, argues Philip Ball.

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QUANTUM MECHANICS

Closed Loophole Confirms the Unreality of the Quantum World

By ANIL ANATHASWAMY

After researchers found a loophole in a famous experiment designed to prove that quantum objects don’t have intrinsic properties, three experimental groups quickly sewed the loophole shut. The episode closes the door on many “hidden variable” theories.

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ABSTRACTIONS BLOG

Why Black Hole Interiors Grow (Almost) Forever

By NATALIE WOLCHOVER

The renowned physicist Leonard Susskind has identified a possible quantum origin for the ever-growing volume of black holes.

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ABSTRACTIONS BLOG

Why Stephen Hawking’s Black Hole Puzzle Keeps Puzzling

By JENNIFER OUELLETTE

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Q & A

On the Best Use of Science to Safeguard Humanity

By CLAUDIA DREIFUS

For 50 years, the astrophysicist Martin Rees has contributed to our understanding of cosmology. Now he is speaking up about the promise and potential dangers of the science and technology that will arrive over the next 50 years and beyond.

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ASTROPHYSICS

Galactic Beacons Get Snuffed Out in a Cosmic Eyeblink

By SHANNON HALL

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ABSTRACTIONS BLOG

What Defines a Stem Cell? Scientists Rethink the Answer

By JORDANA CEPELEWICZ

As it becomes clear that the body’s cells have more diverse regenerative capabilities than expected, experts have had to reconsider their approach to stem cell research.

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