Why can’t penguins fly?
It’s sink or swim when it comes to being a penguin.
Asked by: Sally Thompson, Burnley
Even the very smallest penguin, the fairy penguin, weighs 1kg, which is about as much as a herring gull. But herring gulls have a 1.4m wingspan, compared with just 32cm for the fairy penguin. Water is 784 times denser than air, and around 62 million years ago, penguins began evolving adaptations for swimming underwater. Their bones are filled with heavy bone marrow rather than air and they have much larger stomachs for undergoing long fishing trips away from the nest.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Authors
Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.
Sponsored Deals
May Half Price Sale
- Save up to 52% when you subscribe to BBC Science Focus Magazine.
- Risk - free offer! Cancel at any time when you subscribe via Direct Debit.
- FREE UK delivery.
- Stay up to date with the latest developments in the worlds of science and technology.