DNA Nanostructure (image) California Institute of Technology Caption This is a DNA structure as seen through the 4-D electron microscope invented at Caltech. Credit Zewail & Lorenz/Caltech Usage Restrictions Okay with credit. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.