Elephants normally wash themselves by using their handy trunks to dip into water and then squirt it on themselves. But not Mary, whose been dubbed the “Shower Queen” at the Berlin Zoo. She uses a hose to wash off the dirt, researchers from Berlin’s Humboldt University and the zoo have observed. Mary demonstrates an exceptionally skilful use of the hose, according to their study, and systematically showers herself for several minutes. “I’ve never seen showering behaviour like this in any other elephant,” said Lena Kaufmann, a researcher who contributed to a study about the Asian elephant. “It s…