Cyanothece 51142 (IMAGE) DOE/Pacific Northwest National Laboratory Caption This is Cyanothece 51142 -- a workhorse for natural hydrogen production -- in a bioreactor. Credit Photo courtesy of PNNL 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.