Costa Rica Seed Dispersal (IMAGE) Virginia Tech Caption Annika Nelson (left) and Susan Whitehead (right) studying the chemical ecology of seed dispersal at La Selva Biological Station in Costa Rica. Credit Susan Whitehead for Virginia Tech Usage Restrictions No restrictions. License Public Domain 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.