Lin Jiang, Georgia Tech (1 of 2) (IMAGE) Georgia Institute of Technology Caption Georgia Tech School of Biology assistant professor Lin Jiang displays a microscopic image of a protist species he used to support Darwin’s hypothesis that the struggle for existence is stronger between more closely related species than those distantly related. Credit Georgia Tech/Gary Meek Usage Restrictions None 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.