Koalas have unique fingerprints.

Koalas have unique fingerprints.

Because koalas, doll-sized marsupials that climb trees with babies on their backs, have fingerprints that are almost identical to human ones. ... Not even careful analysis under a microscope can easily distinguish the loopy, whirling ridges on koalas' fingers from our own.

Humans are not the only animals with fingerprints. Gorillas and chimpanzees have their own unique prints, as do koalas.

Humans, along with our closest relatives chimps and gorillas, are pretty much the only animals that have fingerprints. The only other is the koala, an adorable marsupial that is separated from us by 70 million years worth of evolution.