# Archive

## Latest Articles

### She Studies How Addiction Hijacks Learning in the Brain

Erin Calipari works to understand how drugs like opioids and cocaine alter learning circuits and neurochemistry in one of the country's epicenters of substance use disorder and addiction.

### ‘A-Team’ of Math Proves a Critical Link Between Addition and Sets

A team of four prominent mathematicians, including two Fields medalists, proved a conjecture described as a “holy grail of additive combinatorics.”

### The (Often) Overlooked Experiment That Revealed the Quantum World

A century ago, the Stern-Gerlach experiment established the truth of quantum mechanics. Now it’s being used to probe the clash of quantum theory and gravity.

### An Easy-Sounding Problem Yields Numbers Too Big for Our Universe

Researchers prove that navigating certain systems of vectors is among the most complex computational problems.

### A Century Later, New Math Smooths Out General Relativity

Mathematicians prove a theorem that illuminates the geometry of universes with tiny amounts of mass.

### The New Quest to Control Evolution

Modern scientists aren’t content with predicting how life evolves. They want to shape it.

### Evolving Bacteria Can Evade Barriers to ‘Peak’ Fitness

Paradoxically, natural selection can sometimes seem to block organisms from evolving useful adaptations. But a new study of “fitness landscapes” and antibiotic resistance in bacteria shows that life still finds a way.

### Meet Strange Metals: Where Electricity May Flow Without Electrons

For 50 years, physicists have understood current as a flow of charged particles. But a new experiment has found that in at least one strange material, this understanding falls apart.

### Pierre de Fermat’s Link to a High School Student’s Prime Math Proof

How Fermat’s less famous "little theorem" got mathematicians young and old to play with prime-like Carmichael numbers.