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DUNSTABLE, UNITED KINGDOM - APRIL 11: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II and Prince Philip, Duke of Edinburgh feed bananas to Donna, a 7 year old Asian Elephant, as they open the new Centre for Elephant Care at ZSL Whipsnade Zoo on April 11, 2017 in Dunstable, England. (Photo by Max Mumby/Indigo/Getty Images)

DUNSTABLE, UNITED KINGDOM - APRIL 11: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II and Prince Philip, Duke of Edinburgh feed bananas to Donna, a 7 year old Asian Elephant, as they open the new Centre for Elephant Care at ZSL Whipsnade Zoo on April 11, 2017 in Dunstable, England. (Photo by Max Mumby/Indigo/Getty Images)