Carl Zimmer (IMAGE) ETH Zurich Caption Carl Zimmer, columnist at The New York Times and author of “Life’s Edge: The search for what it means to be alive”. Credit Carl Zimmer Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.