Polar bears sometimes bludgeon walruses to death with stones or ice
It’s long been said that a piece of ice is the perfect murder weapon
![illustration of a polar bear standing on a cliff as a rock falls toward a walrus standing on a rock below](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/07/072721_GD_polar-bear-walrus_feat.jpg?fit=1030%2C580&ssl=1)
In this illustration, which appears in an 1865 book by adventurer Charles Francis Hall, a polar bear uses a rock as a tool to kill a walrus. Some have thought that Inuit reports of this behavior were just stories, but new research suggests not.
Charles Francis Hall, Library of Congress