It seems like any animal could benefit from thumbs.
In: Biology
[Thumbs are not actually unique to primates](https://en.wikipedia.org/wiki/Thumb#Other_placental_mammals). There is evidence of opposable digits in pandas, rodents, marsupials, and more. [Even some cats can have thumbs](https://media.giphy.com/media/KtKi9n1k5h5bW/giphy.gif), although they were likely selectively bread for them. While humans and other primates might have the most complex and useful version of a thumb, other species have also managed to find an evolutionary advantage with it.
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