Study Shakes up Sloth Family Tree (IMAGE) University of Chicago Caption New studies rearrange the sloth family tree, which includes the two existing sloths (center and right in the tree) as well as extinct giant ground sloths (bottom). Credit Illustration by Jorge Blanco Usage Restrictions With credit License Licensed 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.