science · Staff Pick

The Invisible Engineers: How AI Is Building at the Scale of Atoms

By Dr. Ananya Mehta

The cooling systems never stopped humming. That was the first thing visitors noticed about Laboratory 4.12 on the third floor of ETH Zurich's Department of Chemistry. On the evening of 17 November 2025, Dr. Lena Krause sat at a horseshoe of screens watching something she had never seen before: a molecular structure, designed seventeen minutes earlier by an AI system called CAMOS-3, that had never existed in nature. The molecule was a cage of interlocking rings trapping a single platinum atom, designed to release it on command. No human chemist had conceived it. This is the story of what happens when artificial intelligence learns to design at the scale of atoms.