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How We See the Beautiful, Violent Sun

May 28, 2026

Over hundreds of years, increasingly sophisticated instruments have revealed — and continue to reveal — the secrets of our star.

A Treasure Trove of Cambrian Fossils Rewrites the Story of Early Life

May 1, 2026

Remarkably preserved fossils found in southern China offer a fascinating window into what life looked like at the end of the Cambrian explosion, with half of the species uncovered being new to science.

A Through-The-Lens Look at the World’s Particle Physics Labs

April 1, 2026

The winning entries in the 2025 Global Physics Photowalk contest showcase the beauty of toil and discovery.

How Can Infinity Come in Many Sizes?

February 23, 2026

Intuition breaks down once we’re dealing with the endless. To begin with: Some infinities are bigger than others.

Fluorescence micrograph showing the dinoflagellate Karenia papiloniacea. The centrin is stained in green, the nucleus in blue, and intracellular crystals in red.

Expansion Microscopy Has Transformed How We See the Cellular World

How physically magnifying objects using a key ingredient in diapers has opened an unprecedented view of the microbial world.

The Quantum Mechanics of Greenhouse Gases

September 15, 2025

Earth’s radiation can send some molecules spinning or vibrating, which is what makes them greenhouse gases. This infographic explains how relatively few heat-trapping molecules can have a planetary effect.

How Does Graph Theory Shape Our World?

June 26, 2025

Maria Chudnovsky reflects on her journey in graph theory, her groundbreaking solution to the long-standing perfect graph problem, and the unexpected ways this abstract field intersects with everyday life.

Does Form Really Shape Function?

June 12, 2025

From brain folds to insect architecture, L. Mahadevan explains how complex biological forms and behaviors emerge through the interplay of physical forces, environment and embodiment.

Will We Ever Prove String Theory?

May 29, 2025

Promise and controversy continues to surround string theory as a potential unified theory of everything. In the latest episode of The Joy of Why, Cumrun Vafa discusses his progress in trying to find good, testable models hidden among the ‘swampland’ of impossible universes.