And just like hair, they fall out from the skin without harming the owner at all. The smaller quills of the North American porcupine may look underwhelming in comparison, but appearances can be ...

When a porcupine feels threatened, it tenses up and attacks predators with a swat of its quill-covered tail. Some quills may ...

Many porcupines live in areas in North America and their quills are so sharp they can puncture the skin and move through muscle. The quills also carry bacteria with them, meaning they can serve as ...