Both the rhino and the hedgehog protect their bodies with formidable armor. Are these defenses really what they seem? The rhino's thick folds of skin are in fact surprisingly sophisticated radiators. But what other purpose could a hedgehog's spines have apart from protection?

Encoded with permission for digital streaming by Infobase on December 20, 2014. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Clara the Tame Rhino(3:47) -- Realistic Rhino Representation (2:11) -- Rhino Mania (1:41) -- Indian Rhino Skin (3:10) -- Myths and Misunderstandings (1:57) -- Hoglet (2:09) -- African Crested Porcupine (1:54) -- Defensive Ball and Procreation (1:49) -- Strange Behavior (1:49) -- Credits: Armoured Animals: Attenborough's Natural Curiosities, Series 2 (0:43).