Profusely Maned High-plains Lion (IMAGE) Field Museum Caption An extensively and richly colored dark-maned male from the Equatorial Middle Elevation Plains at 1,700 meters above sea level. Older lions, like this male, who is past his reproductive prime, typically carry the densest, most extensive and often darkest manes, regardless of where they occur. The authors relied on patterns of tooth wear (as clearly seen here) to age live lions (in addition to other standard aging protocols) for their study, incorporating their extensive experience in aging lion specimens housed in museum collections. Credit Photograph by Harald A. Schuetz, 2001 Usage Restrictions None 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.