How do they do it? Hedgehog quills are filled with air chambers, which make them buoyant. But the quills are still super-strong. And sharp. They're used for self-defense, after all. The trick to ...

When someone says hedgehog, what do you think of? Prickles and Sonic probably spring to mind. But there’s a lot more to these cute creatures than their quills. So Young Post spoke to Dr Michael ...

With one look at the collection of quills on their backs, you’d think the porcupine and the hedgehog are related. However, while they’re both mammals, they have a lot of notable differences.