Biotube-MICRO (IMAGE) NASA/Johnson Space Center Caption A comparison of Arabidopsis thaliana seedlings grown on Earth and in space, with a specific focus on the direction of root growth in the absence of gravity. Credit Anna-Lisa Paul/Principal Investigator Usage Restrictions Anna-Lisa Paul/Principal Investigator License Licensed 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.