Here's the breakdown:
* Humans: Humans have unique fingerprints, meaning no two individuals have the same pattern. This is why fingerprints are used for identification.
* Koalas: Koalas, like humans, have ridges on their fingertips. However, these ridges are less complex and don't form the same distinctive patterns as human fingerprints. They're more like "mini-ridges" and are primarily used for grip and tactile sensation.
So, while both species have ridges on their fingertips, only human fingerprints are considered truly unique and useful for identification purposes.