questionedithistorytranslationsCurrent version This is the accepted version. added by globalquiz.org Feb. 1, 2015, 9:17 a.m. What are hedgehog's spines made of? boneskeratinchitincartilageKeratin is a fibrous protein, a key structural component of the hair, nails, horns, claws and hooves of mammals. Hedgehog spines are hollow hairs made stiff with keratin.globalquiz.orgShare and bring new players to the game!0Very uninterestingToo difficultPoorly writtenIncorrect or questionableCorrect this questionwikipedia → Keratin3Very interesting! wikipedia → Keratinreach: rather globalanimalsbiologyhedgehogsmammalsnatureVotes +3 Very interesting! globalquiz.org