What's a forensic investigator's worst nightmare? Hint: It's a whole lot cuter than whatever you were imagining.
A crime in a zoo's koala cage would probably confound the efforts of even the best detectives. Why? 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.