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

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.

Michael Costanzo: Giant Genetic Map Reveals Life’s Hidden Links

October 25, 2016

Michael Costanzo, a biologist at the University of Toronto and a lead author on the new study, explains why it’s important to understand how genes interact.

Helen Quinn: A Wormhole Between Physics and Education

October 18, 2016

Helen Quinn has blazed a singular path from the early days of the Standard Model to the latest overhaul of science education in the United States.

Pencils Down: Mike Zitolo of School of the Future

October 11, 2016

Michael Zitolo is turning the way science is approached in the classroom upside down.