Have the squirrels gone nuts? Killer squirrels might seem like sci-fi, but squirrels in California have been observed hunting and eating voles for the first time, leading scientists to believe that ...

We think of squirrels as adorably harmless creatures, admiring their bushy tails and twitchy little noses and the way they cram their cheeks with nuts or seeds to bring back to their nests for later.

After more than a decade studying California ground squirrels, Jennifer Smith felt she had a solid understanding of their behavior. Then, in the summer of 2024, her students spotted something she ...