The days of searching the oceans around the world to find and study rare and endangered marine animals are not over. However, an emerging tool that can be used with just a sample of seawater may help scientists learn more about rare marine life than ever before. According to Ellen Pikitch, Ph.D., of Stony Brook University’s School of Marine and Atmospheric Sciences (SoMAS), this 21st Century tool that holds such promise is eDNA analysis. Her explanation was published in a perspectives piece on June 15 in Science.