How do scientists freshen their breath?

Did you hear about the restaurant on the moon?

Did you hear about the mathematician who's afraid of negative numbers?

What's the loudest Christmas song?

What types of dogs are bilingual?

What do you call penguins and polar bears?

What is the worst thing that can happen to a geography teacher?

Why did the botanist go to Harvard?

Where do vehicles hang out all summer?

What animal loves to sway side-to-side?

Did you see that all the ice and snow is melting?

Who is the most forgiving celebrity?

Why aren't there any knock-knock jokes about the United States?

What do you call a fish wearing a bowtie?

What is the only kind of dog you can eat?