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# theoretical physics

## Latest Articles

### What Is a Particle?

It has been thought of as many things: a pointlike object, an excitation of a field, a speck of pure math that has cut into reality. But never has physicists’ conception of a particle changed more than it is changing now.

### The Cosmologist Who Dreams in the Universe’s Dark Threads

Cora Dvorkin discovered new possibilities for what dark matter could be. Now she’s devising unorthodox ways to identify it.

### The Most Famous Paradox in Physics Nears Its End

In a landmark series of calculations, physicists have proved that black holes can shed information.

### A New Map of All the Particles and Forces

We’ve created a new way to explore the fundamental constituents of the universe.

### The Hidden Structure of the Universe

Our new series of articles explores the search for fundamental structure at the edge of science.

### Alchemy Arrives in a Burst of Light

Researchers have shown how to effectively transform one material into another using a finely shaped laser pulse.

### Physicists Argue That Black Holes From the Big Bang Could Be the Dark Matter

It was an old idea of Stephen Hawking’s: Unseen “primordial” black holes might be the hidden dark matter. A new series of studies has shown how the theory can work.

### How Mathematical ‘Hocus-Pocus’ Saved Particle Physics

Renormalization has become perhaps the single most important advance in theoretical physics in 50 years.

### The Mathematical Structure of Particle Collisions Comes Into View

Physicists have identified an algebraic structure underlying the messy mathematics of particle collisions. Some hope it will lead to a more elegant theory of the natural world.