skull

A skull is the hard outer covering of your head that protects your brain.

When we talk about a skull, we usually mean it in a scientific or medical way. We might see pictures of skulls in books about anatomy or in museums to learn about different species. Doctors and researchers often look at human skulls to understand how our brains develop and work. Sometimes, archaeologists study animal skulls to figure out what they ate and where they lived. People who are into science or history often collect replicas of fossils that include skulls to learn more about the past. Even in popular culture, you might see pictures of skulls used as a symbol for something mysterious or spooky, but when we say "skull", it's usually referring to the real thing - not just a decoration!