French and Japanese Scientists Win Chemistry Nobel for Solving Molecule Mystery

UPDATE - follow-up to Chemistry Nobel 2026 awarded to Henri B. Kagan and Kenso Soai: Henri B. Kagan and Kenso Soai have been awarded the 2026 Nobel Prize in Chemistry for discovering non-linear effects and asymmetric organic synthesis.

The Discovery

The Royal Swedish Academy of Sciences announced the prize on October 7, 2026, recognizing work that solves a century-old chemical mystery about how homochirality emerges spontaneously. According to BBC News - Science & Environment, living organisms on Earth only function with one specific mirror-image form of molecules like amino acids, even though lab reactions usually produce an equal mix of both right and left-handed versions. Henri Kagan discovered a way to manipulate reactions in 1986 to create a greater excess of one mirror image, and Kenso Soai later published work in 1995 describing reactions with the potential to be homochiral. Mr. Kagan is born in Boulogne-Billancourt, France, and works at Université Paris-Sud, while Mr. Soai is from Hiroshima and is affiliated with the Tokyo University of Science.

Context

This award highlights fundamental research in organic chemistry that helps scientists understand how life's basic building blocks form. Such chemical understanding is particularly important for making drugs safely, as different mirror-image forms of a molecule can have very different effects on the human body.