UMd. Associate Professors James Farquhar and Alan Jay Kaufman (image) University of Maryland Share Print E-Mail Caption Associate Professors James Farquhar (left) and Alan Jay Kaufman (right) in a University of Maryland geochemistry lab with a 2.5 billion-year-old rock sample Kaufman collected from Western Australia. Credit Photo by John T. Consoli Usage Restrictions Photo must be credited to John T. Consoli 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.