Scientists have turned to genome sequencing to determine how to categorize the platypus. With the help of a female platypus named Glennie, scientists have found that there are reptilian, avian and mammalian genome features present. These findings help prove that the unique platypus really is in a class by itself.

For more information: http://www.allvoices.com/contributed-news/1968300-platypus-genome-is-a-mishmash-of-reptilian-avian-and-mammalian-genomes

For more interesting facts about how the platypus is unique, visit Animal Fact Guide’s article: Platypus