The Joy of Why
Steven Strogatz, Janna Levin and Quanta Magazine
“The Joy of Why” is a Quanta Magazine podcast about curiosity and the pursuit of knowledge. The mathematician and author Steven Strogatz and the cosmologist and author Janna Levin take turns interviewing leading researchers about the great scientific and mathematical questions of our time. New episodes are released every other Wednesday.Quanta Magazine is a Pulitzer Prize–winning, editorially independent online publication launched and supported by the Simons Foundation to illuminate big ideas in science and math through public service journalism. Quanta’s reporters and editors focus on developments in mathematics, theoretical physics, theoretical computer science and the basic life sciences, emphasizing timely, accurate, in-depth and well-crafted articles for its broad discerning audience. In 2023, Steven Strogatz received a National Academies Eric and Wendy Schmidt Award for Excellence in Science Communications partly for his work on “The Joy of Why.”
Episodes
Mentioned books
53 snips
Jul 24, 2025 • 52min
Why Did The Universe Begin?
Thomas Hertog, a theoretical physicist at KU Leuven and former collaborator of Stephen Hawking, delves into the origins of the universe. He discusses their groundbreaking idea that the laws of physics evolved rather than being predetermined. The conversation touches on the rejection of multiverse theories in favor of cosmological natural selection. Hertog also reflects on the complex relationship between the universe's fine-tuning for life and human observation, prompting listeners to reconsider what it truly means to exist within this cosmos.
20 snips
Jul 10, 2025 • 45min
How Can Regional Models Advance Climate Science?
Elfatih Eltahir, a renowned MIT professor of hydrology, climatology, and meteorology, shares his insights on the urgent need for regional climate models. He emphasizes that climate change affects vulnerable areas like the Nile Basin and Singapore, and solutions must incorporate local contexts like disease and population growth. Eltahir introduces the intriguing concept of 'outdoor days' to shift public perception about climate issues while advocating for models that combine scientific data with community engagement to effectively address climate challenges.
48 snips
Jun 26, 2025 • 34min
How Does Graph Theory Shape Our World?
Maria Chudnovsky, a Princeton University professor and expert in graph theory, delves into the world of mathematical relationships. She shares the fascinating history behind graph theory, tracing its roots to Euler's bridge problem. Chudnovsky discusses how graph theory applies to everyday situations, like planning her wedding seating chart. Her insights reveal the harmony between mathematics and art, showcasing how both fields creatively address complex challenges. Plus, she reflects on her unique journey as a 'superstar mathematician' in popular culture.
32 snips
Jun 12, 2025 • 47min
Does Form Really Shape Function?
In this enlightening discussion, L. Mahadevan, a Harvard professor specializing in physics and biology, shares his passion for exploring the connections between form and function. He unravels the intriguing properties of Möbius strips and their implications in geometry. Mahadevan also delves into how brain shapes impact cognitive abilities, and the remarkable design of termite mounds as a model for energy-efficient architecture. His thoughts on the role of curiosity in science and the influence of environmental factors on biology add depth to this captivating conversation.
37 snips
May 29, 2025 • 49min
Will We Ever Prove String Theory?
In this engaging discussion, Cumrun Vafa, a Harvard Professor known for his groundbreaking work in string theory, explores the complexities and implications of his research. He addresses the challenge of proving string theory's validity amidst a landscape of infinite possible universes. Vafa sheds light on his swampland program, which aims to filter out non-viable theories, and how recent discoveries from the BICEP array have revitalized interest. The conversation also delves into the intricacies of dimensions and the quest for testable predictions in the field.
77 snips
May 15, 2025 • 46min
How Did Geometry Create Modern Physics?
Yang-Hui He, a theoretical physicist from the London Institute of Mathematical Sciences and University of Oxford, shares his insights on the profound role of geometry in modern physics. He discusses how ancient geometrical principles transformed into the language of theories like general relativity and string theory. Yang-Hui also reveals the tension between intuitive and formal mathematics and introduces the concept of 'birds' and 'hedgehogs' in mathematical thinking. Finally, they explore the revolutionary potential of AI in advancing mathematical physics.
63 snips
May 1, 2025 • 42min
Will AI Ever Understand Language Like Humans?
In this engaging discussion, guest Ellie Pavlick, a computer scientist and linguist at Brown University, delves into the fascinating world of large language models (LLMs). She explores the gap between LLM language processing and human cognition, questioning what it means to 'understand' language. Pavlick highlights how LLMs learn differently than humans and the implications for creativity and knowledge. The conversation examines the intersection of AI, art, and the philosophical questions that arise in this rapidly evolving field.
40 snips
Apr 17, 2025 • 43min
Can Quantum Gravity Be Created in the Lab?
Monika Schleier-Smith, a physicist at Stanford University, dives into the captivating world of quantum gravity. She explores a groundbreaking experimental approach attempting to create quantum gravity using laser-cooled atom clouds. Topics include the idea of gravity as an emergent phenomenon from quantum entanglement, her scientific journey from high school to patents, and the challenges of unifying gravity with quantum mechanics. With a focus on innovative methodologies, she sheds light on the potential for significant advancements in our understanding of the universe.
50 snips
Apr 3, 2025 • 39min
What Is the True Promise of Quantum Computing?
Dive into the intriguing world of quantum computing and its promise to revolutionize algorithm efficiency. Discover how young computer scientist Ewin Tang challenged conventions by creating classical algorithms that rival quantum advancements. Explore the complexities of recommendation algorithms like those used by Netflix and YouTube, and the delicate balance between quantum and classical solutions. The conversation unpacks the excitement, failures, and breakthroughs in this rapidly evolving field—showcasing the collaborative spirit of scientific inquiry.
46 snips
Mar 20, 2025 • 46min
How Did Multicellular Life Evolve?
Will Ratcliff, a biologist at Georgia Tech known for his innovative work on yeast evolution, delves into the fascinating transition from unicellular to multicellular life. He discusses how his research with 'snowflake yeast' sheds light on this pivotal evolutionary leap. Ratcliff also shares surprising findings about the evolutionary roles of oxygen and cellular specialization. He explores the challenges of defending his work against skeptics and emphasizes the importance of constructive criticism in scientific inquiry.
