Environmental Microbes (image) University of California - Davis Caption Bigger than bacteria but too small to see without a microscope, worms, protozoa, fungi and other organisms play a vital, but largely overlooked role in ecosystems. A new project led by UC Davis and the University of New Hampshire aims to shine a light on this "dark matter of biology." Credit Picture credits: Holly Bik, Antonio Guillen, Bob Goldstein. Reproduced under a Creative Commons license. Usage Restrictions May be used with acknowledgement of the source. 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.