Wilfred van der Donk, and William Metcalf, University of Illinois (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption University of Illinois chemistry professor Wilfred van der Donk (left), microbiology professor William Metcalf and their colleagues discovered the origin of much of the methane in the oxygen-rich regions of the ocean. Credit L. Brian Stauffer Usage Restrictions Image may be used only to accompany stories about the research described in this release. Credit required Share Print E-Mail 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.