In Theory

Art for "What Are Feynman Diagrams?"
By clicking to watch this video, you agree to our privacy policy.

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.


Explore All Videos

Sharon Glotzer: ‘Digital Alchemist’ Seeks Rules of Emergence

March 8, 2017

Sharon Glotzer explains how emergence, entropy and order can all fit together.

Sylvia Serfaty: In Mathematics, ‘You Cannot Be Lied To’

February 21, 2017

Sylvia Serfaty explains why you don’t have to be a genius to become a mathematician.

Francis Su: Math and the Good Life

February 2, 2017

Francis Su explains how mathematics can help a person to live well.

Francis Su: Math Is for Everybody

February 2, 2017

Francis Su discusses how the community of mathematicians tends to exclude certain people.

Marcus Feldman: In Search of Actions That Alter Evolution

January 5, 2017

Marcus Feldman explains how he models the effects of a cultural preference — in this case, a preference for sons over daughters in China.

Elena Aprile: In the Deep, a Drive to Find Dark Matter

December 20, 2016

Elena Aprile explains how she hunts for dark matter in the world’s largest underground laboratory.

Janet Conrad: On a Hunt for a Ghost of a Particle

December 8, 2016

Janet Conrad explains how sterile neutrinos might help physicists move past the Standard Model.

Erik Verlinde: The Case Against Dark Matter

November 29, 2016

Erik Verlinde describes how emergent gravity and dark energy can explain away dark matter.

Cynthia Dwork: How to Force Our Machines to Play Fair

November 23, 2016

Cynthia Dwork explains how to conduct a survey that asks people if they do embarrassing — or even illicit — things.