Ants Have Dual Navigation Systems (image) American Association for the Advancement of Science Share Print E-Mail Caption Cataglyphis bicolor with eyes ventrally blindfolded.. This material relates to a paper that appeared in the Sept. 9, 2016, issue of Science, published by AAAS. The paper, by S.E. Pfeffer at Ulm University in Ulm, Germany and colleagues was titled, "Optic flow odometry operates independently of stride integration in carried ants." Credit Matthias Wittlinger Usage Restrictions Please cite the owner of the material when publishing. This material may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. 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.