autocatalysis.jpg (IMAGE) University of Wisconsin-Madison Caption Life requires repetition of chemical reactions. Describing the kinds of reactions and conditions required for self-sustaining repetition — called autocatalysis — could focus the search for life on other planets. Credit Betül Kaçar Usage Restrictions For editorial use with attribution License Original 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.