Ryan Venturelli.jpg (IMAGE) University of South Florida Caption Ryan Venturelli working with samples in the Ramped Pyrox C-14 System, which Brad Rosenheim calls the “dirt burner.” Now an Assistant Professor at the Colorado School of Mines, Venturelli was a student in Brad Rosenheim’s lab and helped process some of Xingqian Cui’s samples for the Science Advances study. Credit University of South Florida Usage Restrictions NA License Original 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.