What are a rhino's tusks made of?

Answer

A rhino's horn is made up of keratin and calcium. Elephants are the only other tropical animals that have tusks. A rhino's horn can grow to up to 45cm.
Q&A Related to "What are a rhino's tusks made of?"
Answer It is made of keratin, the same substance as hair and fingernails.
http://wiki.answers.com/Q/What_is_a_Rhinoceroc_Tus...
Rhinoceros horn isn't really a horn at all, it's made up of tightly compressed hair.
http://www.chacha.com/question/what-is-a-rhino's-t...
A Rhino horn is made of keratin. The horn is a pretty distinctive feature. Name 'rhinoceros' is actually made of 2 Greek words meaning 'nose' and 'horn'.
http://www.kgbanswers.co.uk/what-is-a-rhino-tusk-m...
The horns of a rhinoceros are unlike horns of other animals because they are made up of keratin only and lack the boney center. They are actually made up of the same thing our hair
http://www.ask.com/web-answers/Vehicles/Motorcycle...
Explore this Topic
Elephant's tusks are mainly made from a tough substance called ivory. Their tusks have led to their downfall as they are hunted because of their precious ivory ...
Rhino horns are composed of a fibrous protein called keratin, which is the same substance found in human fingernails and hair. Keratin is also present in feathers ...
There are variety of different reasons that people poach rhinos. For example, the poach them for game and fun. They also poach them for their ivory tusks. ...
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