Rhino horns are made of keratin, just like our fingernails, and grow throughout their lifetime.
Indian and Javan rhinos have one horn.
Rhinos have poor eyesight.
Black rhinos can run up to 40 miles per hour.
Rhinos may look indestructible, but their skin is actually quite sensitive, especially to sunburn and biting insects, which is why they like to wallow in the mud.
(Rhino facts courtesy of the World Wildlife Fund. Visit for more Rhino information.)