We all know someone who has undergone a Nuclear Magnetic Resonance (NMR) scan. But only very few know that NMR is a powerful tool for the determination of the three-dimensional structure of molecules. This has been explained by Dr. Marta Bruix, from the Protein Structure, Dynamics and Interactions by NMR Group, on April 20th in the RTVE program “On Giant's Shoulders” (http://bit.ly/1LbRKEk).