NATURE: Hippo Beach - Taking a closer look at these heavyweight "river horses."
Owen and Mzee's Web Log - A hippo called Owen survived the December 2004 tsunami and was rescued by a Kenyan animal sanctuary. There, he bonded with a giant century-old tortoise called Mzee. This is their story.
Wikipedia: Hippopotamus - Hyperlinked article on the "river horse" dicussing its characteristics, distribution, species, and more.