Is Evolution Predictable? (VIDEO) Smithsonian Tropical Research Institute This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Is Evolution Predictable? This study of Heliconius butterflies says that it isn't. Credit I4H Usage Restrictions For use with this press release. 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.