Can you stick out your tongue and lick your nose? Most people can’t.
Can you stick out your tongue just a little more and lick your eyeball? Almost no one can do that!
Now, it’s a really bad idea for us to lick our eyeballs. But it’s a great idea for a small lizard called the crested gecko. This gecko needs to wet its eyeballs.
Why? The gecko doesn’t have something that we use every day. It doesn’t have eyelids.