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# Physics

## Latest Articles

### Do We Need a New Theory of Gravity?

Since Newton had his initial revelation about gravity, our understanding of this fundamental concept has evolved in unexpected ways. In this week’s episode, theoretical physicist Claudia de Rham and co-host Janna Levin discuss the ways our current understanding of gravity needs to continue to evolve.

### Computer Scientists Prove That Heat Destroys Quantum Entanglement

While devising a new quantum algorithm, four researchers accidentally established a hard limit on entanglement.

### Mathematicians Prove Hawking Wrong About the Most Extreme Black Holes

For decades, extremal black holes were considered mathematically impossible. A new proof reveals otherwise.

### Diminishing Dark Energy May Evade the ‘Swampland’ of Impossible Universes

The largest-ever 3D map of the cosmos hints that the dark energy that’s fueling the universe’s expansion may be weakening. One community of theoretical physicists expected as much.

### The Webb Telescope Further Deepens the Biggest Controversy in Cosmology

A long-awaited study of the cosmic expansion rate suggests that when it comes to the Hubble tension, cosmologists are still missing something.

### The Geometric Tool That Solved Einstein’s Relativity Problem

Tensors are used all over math and science to reveal hidden geometric truths. What are they?

### Physicists Pinpoint the Quantum Origin of the Greenhouse Effect

Carbon dioxide’s powerful heat-trapping effect has been traced to a quirk of its quantum structure. The finding may explain climate change better than any computer model.

### ‘Metaphysical Experiments’ Probe Our Hidden Assumptions About Reality

Experiments that test physics and philosophy "as a single whole" may be our only route to surefire knowledge about the universe.

### Vacuum of Space to Decay Sooner Than Expected (but Still Not Soon)

One of the quantum fields that fills the universe is special because its default value seems poised to eventually change, changing everything.