Simulation Shapshot (IMAGE) Simons Foundation Caption A snapshot from a simulation of how microtubules bend and direct material in a maturing egg cell into a twister-like flow. Credit S. Dutta et al. Usage Restrictions None 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.