The Big Question: Why can't penguins fly?
Penguins have wings, but they can't fly?! But why?
Now that is a Big Question that needs answering!
It was sent to us by 10 year old Evie in Wales.
We're not winging it with this one, so we've got a penguin expert to help explain.
If you've got your own Big Question you would like us to answer get in touch!