Still Waters Posted September 26, 2013 #1 Share Posted September 26, 2013 About 513 million years ago, a creature curled up like a pill bug to protect itself from predators, a recently-discovered fossil suggests. The new discovery is the oldest evidence that trilobites rolled up in self-defense so early in their evolutionary history. http://www.livescien...-pill-bugs.html Link to comment Share on other sites More sharing options...
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