In Theory
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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Emily Riehl: Mathematician, Musician, Educator
Riehl talks about how higher category theory is like the viola, why she’s drawn to expository writing, and the responsibility mathematicians have to address social justice issues.
Claudia de Rham: “Gravity Is the Law That Makes Everything Happen”
Claudia de Rham explains why gravity is so fundamental to our understanding of everything in the universe.
John Priscu and the Search for Life Under Ice
The microbial ecologist John Priscu of Montana State University discusses what led him to seek life beneath the barren, frozen wastes of Antarctica — and how his discoveries there are shaping the search for life on other worlds.
Liz MacDonald on the strangest auroras in the world.
Liz MacDonald discusses what more people should know about the auroras.
James Maynard Solves the Hardest Easy Math Problems
James Maynard talks about why he’s obsessed with prime numbers.
Katie Mack Knows How It’s All Going to End
Katie Mack describes the most likely scenario for the end of the universe.
Epidemiologist Tara Smith Answers Coronavirus Questions
Highlights from Tara C. Smith’s live YouTube event on May 1, 2020, in which she answered reader questions about the COVID-19 pandemic.
Pincelli Hull Explains What Killed Off the Dinosaurs
Evidence from the oceans decisively shows that an asteroid strike caused the last mass extinction, argues Pincelli Hull. The cataclysm continues to hold lessons for today.
Ronald Rivest on Building Better Elections
Ronald Rivest of the Massachusetts Institute of Technology describes the role of computers in voting and what makes elections trustworthy.