Stretchy nerves help some big whales open wide
![stretchy nerves in a whale](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/05/ticker_whales.jpg?fit=860%2C460&ssl=1)
WIDE OPEN Fin whales and others like them have stretchy nerves (yellow) in their mouths and tongues that help the whales open their mouths wide to swallow a lot of prey.
Vogl et al./Current Biology 2015