An Asiatic lion is seen at ZSL London Zoo's 2017 annual weigh-in event in London, Britain, on Aug. 24, 2017. With more than 20,000 animals in their care, ZSL London Zoo's keepers spent hours during the annual weigh-in event recording the heights and weights of all the animals to monitor their health and well-being. (Xinhua/ZSL London Zoo) -EDITORIAL USE ONLY-
