Dinosaur-Era Climate Change Study Suggests Reasons for Turtle Disappearance (image) University of Calgary Share Print E-Mail Caption This is a reconstruction of the Drumheller area 68 million years ago, showing the transition from a drier and cool climate (left) to a humid and warm climate (right). Credit Illustration by Julius Csotonyi. Courtesy of the Royal Tyrrell Museum. Usage Restrictions Please use 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.