(IMAGE) Smithsonian Tropical Research Institute Caption Stefan Schnitzer, a research associate at the Smithsonian Tropical Research Institute, talks about lianas, or woody vines, on Panama's Barro Colorado Island on January 15, 2014. Credit Sean Mattson/STRI Usage Restrictions For media use only 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.