Koala fingerprints are almost indistinguishable from human ones, even under a microscope.
Why it is true
Koalas developed unique fingerprints to better grip tree branches, resulting in a ridge pattern so similar to humans that it has confused investigators at crime scenes.
Source: Marine Biology
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.
Related facts
Animals
Koala fingerprints are so similar to humans that they have occasionally been confused at crime scenes.
Animals
Koalas have fingerprints that are almost identical to humans.
Animals
Snakes are the only truly carnivorous animals.
Animals
Koala fingerprints are virtually indistinguishable from human fingerprints.