When Water Met Iron Deep Inside the Earth (image) Carnegie Institution for Science Share Print E-Mail Caption An illustration from the paper showing oxygen and hydrogen cycling in the deep Earth. Credit From the team's paper. Usage Restrictions With credit 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.