Trilobites: A Shallow Hypothesis for Where Fish First Evolved They lacked jaws. Some had armor and spikes. And they were some of our earliest ancestors with spines in the shallow coasts around supercontinents. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Mexican Report Says Investigators Botched Search for 43 StudentsWhat E.U. Leaders Are Wrestling With at the End of a Tough YearRussia Turns Over Cybertheft Suspect to the U.S.Mexico Refuses to Release Review of Vanished Students’ Case‘It’s Like a Miracle’: Woman Gives Birth Using Ovary Frozen Since Childhood‘Brexit’ Talks Could Stretch 10 Years, British Official Warns
