In Theory

Art for "What Are Feynman Diagrams?"
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What Are Feynman Diagrams?

The physicist Richard Feynman devised a system of line drawings that simplified calculations of particle interactions and helped rescue the field of quantum electrodynamics.


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She Tracks Wildlife eDNA on Everest and in the Andes

April 17, 2023

Tracie Seimon of the WCS’s Molecular Diagnostics Laboratory describes her biodiversity research, which is based on eDNA — DNA collected from the environment.

The Computer Scientist Taking on Big Tech: Privacy, Lies and AI

March 10, 2023

Narayanan discusses his work on de-anonymization and fairness and why it
matters.

Could One Physics Theory Unlock the Mysteries of the Brain?

January 31, 2023

The phenomenon of criticality can explain the sudden emergence of new properties in a wide range of complex systems, from avalanches to flocks of birds to stock market crashes. Neuroscientists are now seeking evidence that criticality is at work in the brain’s networks of neurons.

2022’s Biggest Breakthroughs in Math

December 22, 2022

In 2022, mathematicians solved a centuries-old geometry question, proved the best way to minimize the surface area of clusters of up to five bubbles and proved a sweeping statement about how structure emerges in random sets and graphs.

Wormhole in the Lab

November 30, 2022

Wormholes were first envisioned almost a century ago, but it would take a number of theoretical leaps and a “crazy” team of experimentalists to build one on a quantum computer.

The High Schooler Who Solved a Prime Number Theorem

October 13, 2022

Daniel Larsen wouldn’t let go of an old question about Carmichael numbers. “It was just stubbornness on my part,” he said.

One Man’s Mission to Unveil Math’s Beauty

September 13, 2022

Richard Rusczyk, founder of Art of Problem Solving, discusses how to bring out the joy, creativity and beauty in math.

How Two Physicists Unlocked the Secrets of Two Dimensions

August 16, 2022

Condensed matter physics is the most active field of contemporary physics and has yielded some of the biggest breakthroughs of the past century.  Now for the first time, Jie Shan and Fai Mak, a husband-and-wife team at Cornell University, have figured out a way to create artificial atoms in the lab, opening the door to a new era in research.

The Deep Mystery at the Heart of Life on Earth

August 8, 2022

As an evolutionary biochemist at University College London, Nick Lane explores the deep mystery of how life evolved on Earth. His hypothesis that life started with primitive metabolic reactions in deep-sea hydrothermal vents illuminates the outsized role that energy may have played in shaping evolution.