Zookeeper Nick feeds a Giraffe to measure its height during London Zoo's annual weigh in, in London, Thursday, August 23, 2018. Home to more than 19,000 animals in their care, 800 different species, zookeepers regularly record the heights and weights of all the creatures at ZSL London Zoo as a key way of monitoring the residents' overall wellbeing. (Photo by Frank Augstein/AP Photo)
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