Summary
So similar that forensic experts can have trouble telling them apart. Not common ancestry - parallel evolution.
Koala fingerprints are so similar to humans that forensic experts can have trouble distinguishing them. Under a microscope, they"re nearly identical.
This is "convergent evolution" - evolved from similar needs, not common ancestry. Both species grip with fingertips, and prints strengthen grip.
Koalas are marsupials, very distantly related to humans.
Source: Natural Science Journal
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