How do vaccines work? 

Is it possible to become invisible?

Why do we celebrate April Fool's Day?

Who invented candy?  

Winter Science:

Why is snow white?

Why do bears hibernate?  

What is the coldest place on Earth?

Is there a pole at the North Pole? 

Why does it get cold in winter?

Where do bugs go in winter?      

Halloween Science with Doug!  

What would happen if you didn't have a skull? 

What is the biggest spider in the world? 

Why do skeletons have so many bones?

Why do owls say "hoo"? 

How do things glow in the dark? 

Do bats really drink blood?

Why are pumpkins so popular every fall? 

Why are so many people scared of bugs?