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!