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

Iceland Is a Portal to Mars

April 6, 2021

Volcanic eruptions are intimately connected with life. Scientists are using the current eruptions in Iceland to understand the possible history of life on Mars.

Fighting for Equality in Computer Science and Beyond

April 1, 2021

Abebe switched fields from math to computer science in order to learn tools she could apply to social problems like poverty and educational inequality.

Why Extraterrestrial Life Might Not Be So Alien

March 18, 2021

The zoologist Arik Kershenbaum of the University of Cambridge discusses convergent evolution, animal communications and why life throughout the universe may have certain common features.

This U.S. Olympiad Coach Has a Unique Approach to Math

February 18, 2021

Po-Shen Loh discusses his approach to coaching the United States International Mathematical Olympiad team and reveals what he believes to be the major problem with math education.

Why COVID-19 Models Don’t Predict the Future

February 12, 2021

To understand what epidemiological models can tell us, it helps to first understand what they can’t. In this comprehensive explainer, we break down how epidemiological models are built and dispel some of the common misunderstandings about their applications.

How Cosmic Dust Reveals the Secrets of the Universe

February 4, 2021

Matthew Genge shows explains to read the history of our solar system in the language of cosmic dust.

Meet One of NASA’s Pioneering Women

January 19, 2021

Christine Darden describes what it was like working at NASA in the 1960s and how she became an authority on minimizing sonic booms.

What Makes Physics Beautiful, According to a Nobel Prize Winner

January 12, 2021

Frank Wilczek discusses the work that led to his Nobel and the inherent beauty of physical law.

The Riemann Hypothesis, Explained

January 5, 2021

Alex Kontorovich, professor of mathematics at Rutgers University, breaks down the notoriously difficult Riemann hypothesis in this comprehensive explainer.