Network Analysis of Fossils (IMAGE) Rensselaer Polytechnic Institute Caption Network analysis of marine fossil records over the past 541 million years revealed the ecological impact of mass extinctions and may help us anticipate the consequences of a 'sixth mass extinction.' Credit Rensselaer Polytechnic Institute 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.