“I want a hippopotamus for Christmas. Only a hippopotamus will do. I don’t want a doll, no dinky Tinkertoy. I want a hippopotamus to play with and enjoy!”       I used to sing that song all the time as a kid, never thinking I would live in a place where I actually have hippos! A few weeks ago, Sharon and I were given the opportunity to go canoeing on the Zambezi River with a couple of friends we have made here. We were told this area of the river only had 23 hippos in total, and ...