The similarities between Hesperornis and modern day penguins is called "Convergent Evolution," a fascinating topic which we will undoubtedly touch upon numerous times. According to Science Daily, convergent evolution is, "In evolutionary biology, convergent evolution is the process whereby organisms not closely related (not monophyletic), independently evolve similar traits as a result of having to adapt to similar environments or ecological niches." In English, when two animals, not necessarily closely related at all, evolve similar features that serve the same purpose.
|An (excellent) drawing of the skull of Thylacosmilus|
This post is part of the "Convergent Evolution" series. For the rest of the posts in this series, click HERE.