Gut Fungi for Biofuel (IMAGE) DOE/Pacific Northwest National Laboratory Caption Harvested from the poop of goats, horses and sheep, anaerobic gut fungi pictured here help herbivores digest stubborn plant material. A team of researchers report in the journal Science that these fungi could potentially lead to cheaper biofuel and bio-based products. Credit University of California, Santa Barbara Usage Restrictions Credit University of California, Santa Barbara. 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.