(VIDEO) University College London This video is under embargo. Please login to access this video. Caption Three-dimensional micro-CT reconstruction of two parallel-aligned twisted filaments made of hematite. (The red and green colours represent hematite at different concentrations.) This comes from a pillar fabricated from the jasper nodule in the Nuvvuagittuq banded iron formation. Credit Credit: Francesco Iacoviello Usage Restrictions To be used with credit and only in relation to this study. License Original content 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.