Lachniet with stalagmite (2) (IMAGE) University of Nevada, Las Vegas Caption UNLV paleoclimatologist Matthew Lachniet holds a stalagmite he retrieved from an undisturbed Grand Canyon cave in 2017. Credit Laura Sangaila Usage Restrictions please credit the photograper 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.