Pain in the back

Five-month-old spotted hyena "Juma" plays with mother "Malindi" in the open air enclosure at the zoo Berlin-Friedrichsfelde in Berlin, Germany. The zoo is the only one in the world that presents animals of all four families of hyenas: brown hyena, striped hyena, aardwolf and spotted hyena.
Jarg Carstensen, AFP/Getty Images
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