What Are Our Nails For?
What Are Our Nails For? Our nails are very useful. Our fingernails help us to pick small objects and to do fine work. They also protect the
Tag
Keratin
How Do Baleen Whales Eat?
How Do Baleen Whales Eat? Not all whales have big teeth, or throats large enough to swallow a man. Whales known as “baleen” whales have thro
Do Porcupines Throw Their Quills?
Do Porcupines Throw Their Quills? Porcupines are small forest animals famous for their bristling armor of sharp quills, which are long, stif
Why Do Birds Molt?
Birds molt because their feathers wear out, as clothes do, and need to be replaced. The process is called “molting.” Birds molt their feathe
What Is a Rhinoceros’s Horn Made Of?
What Is a Rhinoceros’s Horn Made Of? The horn of the rhinoceros is a dermal one, meaning made from something much like skin. Skin is compo