Ehab Abouheif, McGill University (IMAGE) McGill University Caption Ehab Abouheif, a McGill biologist has been studying ants for close to 25 years. His interested in ant evolution was prompted by reading Charles Darwin's The Origin of the Species, where he describes how perplexed he felt about the great variety in the sizes of worker ants in a single colony -- from the large-headed "soldier" ants to the small-bodied "minor" workers. Credit Neale McDevitt Usage Restrictions None 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.