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:North Korean Media, in Rare Critique of China, Says Nuclear Program Will ContinueEurope Edition: France, Juventus, ‘Brexit’: Your Thursday BriefingBuckingham Palace Meeting Provokes Frenzy of SpeculationLive Briefing: What to Watch For: Turnbull’s First Meeting With President TrumpSt. Pierre Journal: Far From France, Island Outpost Is Never Far From French PoliticsIraqi Forces Open a Front in West Mosul, Trying to Squeeze ISIS
