'A horse's hooves are made up of this protein, the same protein found in your fingernails'
Keratin
GENERAL SCIENCE: A horses hooves are made up of this protein, the same protein found in your fingernails
A horse's hooves are made up of this protein, the same protein found in your fingernails
A horse's hooves are made up of this protein, the same protein found in your fingernails
GENERAL SCIENCE
Keratin
GENERAL SCIENCE