Figure 1 (video) Japan Science and Technology Agency Share Print E-Mail Loading video... Caption Molecular structure of an all-benzene knot. X-ray crystallography was used to prove that this is a molecule with a knot topology. Carbon atoms are colored in gray and hydrogen atoms are colored in white. Credit Nagoya University Usage Restrictions None Share Print E-Mail 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.